_ _    _ _____  ___   __                       
 __      _(_) | _(_)___ / ( _ ) / /_   ___ ___  _ __ ___  
 \ \ /\ / / | |/ / | |_ \ / _ \| '_ \ / __/ _ \| '_ ` _ \ 
  \ V  V /| |   <| |___) | (_) | (_) | (_| (_) | | | | | |
   \_/\_/ |_|_|\_\_|____/ \___/ \___(_)___\___/|_| |_| |_|

User:Proteins/mosheadcheck.js

The world is full of mysteries and surprises, and User:Proteins/mosheadcheck.js is one of them. In this article, we will thoroughly explore everything User:Proteins/mosheadcheck.js has to offer, from its origins to its impacts on today's society. With a multidisciplinary approach, we will examine different perspectives and opinions on User:Proteins/mosheadcheck.js, in order to obtain a complete and enriching vision. Throughout these pages, we will discover the influences of User:Proteins/mosheadcheck.js in culture, the environment, politics and science, offering an objective and critical look that allows us to reflect on its importance in the contemporary world.
//<pre>
// Checks whether the Manual of Style is satisfied for article titles and section headings
//
// To use this script, add "importScript('User:Proteins/mosheadcheck.js');" to your monobook.js subpage 
// under your user page, as you can see at User:Proteins/monobook.js

// Black list of words that probably shouldn't appear at the start of a section heading
var forbidden_first_words_in_section_headings = [
"a", "an", "the", "in", "on", "concerning", "about", "through", "against", "for", "with", "without", "around", "from", "out", "because", "since", "while", "during", "throughout", "my", "your", "his", "her", "its", "our", "their", "I", "me", "you", "he", "him", "she", "it", "we", "us", "they", "them"
];

//****************************************************
// Check that the section headings conform to MOS:HEAD
//****************************************************
function checkSectionHeadings() {
	var alert_string = "";

	var num_errors = 0;
	var error_index = 0;
	var error_string = "";
	var max_num_errors_per_alert = 10;
	var error_string_list = new Array();

	var body_content;
	var article_title_node;
	var article_title = "";

	var anchors;
	var temp_anchor;
	var num_anchors = 0;
	var anchor_index = 0;
	var num_H2_anchors = 0;

	var anchor_string_index = 0;
	var proper_anchor_level = 0;
	var proper_anchor_string = "";

	var parent_node;
	var sibling_node;
	var next_sibling_node;

	var child_nodes;
	var num_child_nodes;

	var span_nodes;
	var temp_span_node;
	var num_span_nodes = 0;
	var span_node_index = 0;

	var anchor_level = 0;
	var prev_anchor_level = 0;

	var section_name = "";
	var temp_anchor_name = "";
	var num_section_names = 0;
	var section_name_index = 0;
	var apparent_section_name = "";
	var section_name_list = new Array();

	var words;
	var temp_word;
	var first_word;
	var num_words = 0;
	var word_index = 0;

	var forbidden_word;
	var num_forbidden_words = forbidden_first_words_in_section_headings.length;

	var num_See_also_sections = 0;
	var num_Notes_sections = 0;
	var num_References_sections = 0;
	var num_Bibliography_sections = 0;
	var num_Further_reading_sections = 0;
	var num_External_links_sections = 0;


// Get the bodyContent node
	body_content = document.getElementById('bodyContent');
	if (!body_content) { 
		error_string = "ERROR: There is no bodyContent node in this article.";
		window.alert(error_string);
		return;
	}

// Determine the article title and check for MoS violations
	num_errors = 0;
	error_string = "";

	article_title_node = body_content.previousSibling;
	while ((article_title_node) && (article_title_node.nodeType != 1)) { 
		article_title_node = article_title_node.previousSibling;
	}
	if (article_title_node) { 
		if ((article_title_node.nodeName == "H1") && (article_title_node.className.match(/firstHeading/))) { 
			article_title = article_title_node.innerHTML;
			article_title = article_title.replace(/<span*>.*<\/span>/, "");

			if (!article_title.match(/^/)) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": Article title \"" + article_title + "\" does not begin with a capital letter or a digit.\n";
				error_string += "\tPlease capitalize the first word of the title, but no other words.\n";
				error_string_list.push(error_string);
				article_title_node.style.cssText = "background-color:red";
			}

			// Check for punctuation generally
			if (article_title.match(//g)) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": Article title \"" + article_title + "\" has punctuation or non-English characters.\n";
				error_string_list.push(error_string);
				article_title_node.style.cssText = "background-color:red";
			}
			if ((article_title.match(/\s\-/g)) || (article_title.match(/\-\s/g))) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": Article title \"" + article_title + "\" has a spaced hyphen.\n";
				error_string += "\tPlease use hyphens only for compound nouns and adjectives in article titles.\n";
				error_string_list.push(error_string);
				article_title_node.style.cssText = "background-color:red";
			}
			if ((article_title.match(/\s–/g)) || (article_title.match(/–\s/g))) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": Article title \"" + article_title + "\" has a spaced en-dash.\n";
				error_string += "\tPlease use en-dashes only for compound nouns and adjectives in article titles.\n";
				error_string_list.push(error_string);
				article_title_node.style.cssText = "background-color:red";
			}

			words = article_title.split(' ');
			if (words) { 
				num_words = words.length;
				if (num_words > 0) { 
					if (num_words > 9) { 
						num_errors++; 
						error_string = "ERROR " + num_errors + ": Article title \"" + article_title + "\" has more than nine words (" + num_words + " words).\n";
						error_string_list.push(error_string);
						article_title_node.style.cssText = "background-color:red";
					}

					for (word_index=0; word_index<num_words; word_index++) {
						if ((word_index > 0) && (words.match(/^/)) && (!words.match(/:$/))) { 
							num_errors++; 
							error_string = "ERROR " + num_errors + ": Word \"" + words + "\" in article title \"" + article_title + "\" is capitalized.\n";
							error_string += "\tPlease capitalize only the first word of an article title, unless a proper name.\n";
							error_string_list.push(error_string);
							article_title_node.style.cssText = "background-color:red";	
						}
						temp_word = words.substr(1);
						if (!temp_word) { continue; }
						if (temp_word.match(//))  { 
							num_errors++; 
							error_string = "ERROR " + num_errors + ": Word \"" + words + "\" in article title \"" + article_title + "\" has internal capital letters.\n";
							error_string_list.push(error_string);
							article_title_node.style.cssText = "background-color:red";							
						}
					} // closes loop checking the individual words

					first_word = words.toLowerCase();
					for (word_index=0; word_index<num_forbidden_words; word_index++) {
						forbidden_word = forbidden_first_words_in_section_headings;
						if (first_word == forbidden_word) {
							num_errors++; 
							error_string = "ERROR " + num_errors + ": Article title \"" + article_title + "\" begins with a forbidden word \"" + forbidden_word + "\".\n";
							switch (forbidden_word) {
 								case "a":
								case "an":
									error_string += "\tPlease do not start an article title with an indefinite article such as \"" + forbidden_word + "\".\n";
							 		break;
 								case "the":
									error_string += "\tPlease do not start an article title with an definite article such as \"" + forbidden_word + "\".\n";
							 		break;
 								case "in":
								case "on":
								case "for":
								case "out":
								case "with":
								case "from":
								case "about":
								case "around":
								case "through":
								case "without":
								case "against":
									error_string += "\tPlease do not start an article title with a preposition such as \"" + forbidden_word + "\".\n";
							 		break;

								case "concerning":
									error_string += "\tPlease do not start an article title with a verb participle such as \"" + forbidden_word + "\".\n";
							 		break;
								case "since":
								case "while":
								case "during":
								case "because":
								case "throughout":
									error_string += "\tPlease do not start an article title with a conjunction such as \"" + forbidden_word + "\".\n";
							 		break;
								case "my":
								case "your":
								case "yours":
								case "his":
								case "her":
								case "hers":
								case "its":
								case "our":
								case "their":
								case "I":
								case "me":
								case "you":
								case "he":
								case "him":
								case "she":
								case "it":
								case "we":
								case "us":
								case "they":
								case "them":
									error_string += "\tPlease do not start an article title with a pronoun such as \"" + forbidden_word + "\".\n";
							 		break;
							} // closes switch on the forbidden word
							error_string_list.push(error_string);
							article_title_node.style.cssText = "background-color:red";
							break; // break out of loop over forbidden words
						}
					}
				} // closes check for positive number of words in article title
			} // closes check  that words exist in the article title
		} // closes check for proper article title
	} // closes check for article title node
	section_name_list.push(article_title);

// Get the document anchors
	anchors = document.anchors;
	if (!anchors) { 
		window.alert("This document has no anchors.\n\n");
		return;
	}
	num_anchors = anchors.length;
	if (num_anchors<1) { 
		window.alert("This document has zero anchors.\n\n");
		return;
	}

// Loop over the anchors
	num_See_also_sections = 0;
	num_Notes_sections = 0;
	num_References_sections = 0;
	num_Bibliography_sections = 0;
	num_Further_reading_sections = 0;
	num_External_links_sections = 0;

	num_H2_anchors = 0;
	num_section_headings = 0;
	section_name = "lead section";
	prev_anchor_level = 1;  //begin at the H1 heading

	for (anchor_index=1; anchor_index<num_anchors; anchor_index++) {
		temp_anchor = anchors;
		if (!temp_anchor) { continue; }

		parent_node = temp_anchor.parentNode; 
		if (!parent_node) { continue; }
 
		sibling_node = parent_node.nextSibling;
		if (!sibling_node) { continue; }

		temp_anchor_name = temp_anchor.name;

// Check headings for jumps upwards in heading level
		anchor_level = 0;
		if (sibling_node.nodeName == "H1") {
			num_errors++;
			if (num_H2_anchors == 0) { 
				error_string = "ERROR " + num_errors + ": Illegal H1 heading \"" + temp_anchor_name.replace(/(_+)/ig, " ") + "\" in the lead section\n";
			} else { 
				error_string = "ERROR " + num_errors + ": Illegal H1 heading \"" + temp_anchor_name.replace(/(_+)/ig, " ") + "\" in section \"" + section_name.replace(/(_+)/ig, " ") + "\"\n";
			}
			error_string_list.push(error_string);
			sibling_node.style.cssText = "background-color:red";
		} else if (sibling_node.nodeName == "H2") {
			anchor_level = 2;	
		} else if (sibling_node.nodeName == "H3") {
			anchor_level = 3;	
		} else if (sibling_node.nodeName == "H4") {
			anchor_level = 4;	
		} else if (sibling_node.nodeName == "H5") {
			anchor_level = 5;	
		}  else { 
			next_sibling_node = sibling_node.nextSibling;
			if (!next_sibling_node) { continue; }

// Check headings for jumps upwards in heading level
			if (next_sibling_node.nodeName == "H1") {
				num_errors++;
				if (num_H2_anchors == 0) { 
					error_string = "ERROR " + num_errors + ": Illegal H1 heading \"" + temp_anchor_name.replace(/(_+)/ig, " ") + "\" in the lead section\n";
				} else { 
					error_string = "ERROR " + num_errors + ": Illegal H1 heading \"" + temp_anchor_name.replace(/(_+)/ig, " ") + "\" in section \"" + section_name.replace(/(_+)/ig, " ") + "\"\n";
				}
				error_string_list.push(error_string);
				next_sibling_node.style.cssText = "background-color:red";
			} else if (next_sibling_node.nodeName == "H2") {
				anchor_level = 2;	
			} else if (next_sibling_node.nodeName == "H3") {
				anchor_level = 3;	
			} else if (next_sibling_node.nodeName == "H4") {
				anchor_level = 4;	
			} else if (next_sibling_node.nodeName == "H5") {
				anchor_level = 5;	
			}
			sibling_node = next_sibling_node;
		} // closes assignment of the anchor level, if any 
 
		if (((anchor_level - prev_anchor_level) > 1) && (prev_anchor_level != 0)) {
			proper_anchor_level = prev_anchor_level - 0 + 1;
			proper_anchor_string = "";
			for (anchor_string_index=0; anchor_string_index<proper_anchor_level; anchor_string_index++) { 
				proper_anchor_string += "=";
			}

			if (num_H2_anchors == 0) {
				num_errors++;
				error_string = "ERROR " + num_errors + ": H" + prev_anchor_level + " to H" + anchor_level + " jump in the lead section\n";
				error_string += "\tThe correct subheading would be H" + proper_anchor_level + ", which is \"" + proper_anchor_string + temp_anchor_name.replace(/(_+)/ig, " ") + proper_anchor_string + "\" in wiki-markup.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			} else {
				num_errors++; 
				error_string = "ERROR " + num_errors + ": H" + prev_anchor_level + " to H" + anchor_level + " jump in section \"" + section_name.replace(/(_+)/ig, " ") + "\"\n";
				error_string += "\tThe correct subheading would be H" + proper_anchor_level + ", which is \"" + proper_anchor_string + temp_anchor_name.replace(/(_+)/ig, " ") + proper_anchor_string + "\" in wiki-markup.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			}
		}


// Check section names
		if (anchor_level > 0) { 
			section_name = temp_anchor.name;
			prev_anchor_level = anchor_level;

			// Compare the heading section name with the anchor section name
			apparent_section_name = section_name;
			span_nodes = sibling_node.getElementsByTagName("SPAN");
			if (span_nodes) { 
				num_span_nodes = span_nodes.length;
				if (num_span_nodes > 0) { 
					for (span_node_index=0; span_node_index<num_span_nodes; span_node_index++) { 
						temp_span_node = span_nodes;
						if (!temp_span_node) { continue; } 

						if (temp_span_node.className == "mw-headline") { 
							apparent_section_name = temp_span_node.innerHTML;
							apparent_section_name = apparent_section_name.replace(/<+>/ig, "");

							// Check for links in section name
							child_nodes = temp_span_node.getElementsByTagName("A");
							if (child_nodes) { 
								num_child_nodes = child_nodes.length;
								if (num_child_nodes > 0) { 
									num_errors++; 
									error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" has a forbidden hyperlink.\n";
									error_string += "\tSection headings should never have hyperlinks.\n";
									error_string_list.push(error_string);
									sibling_node.style.cssText = "background-color:red";
								}
							} // closes check for child nodes in span node

							// Check for boldface type in section name
							child_nodes = temp_span_node.getElementsByTagName("B");
							if (child_nodes) { 
								num_child_nodes = child_nodes.length;
								if (num_child_nodes > 0) { 
									num_errors++; 
									error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" has boldface formatting.\n";
									error_string += "\tIt is never appropriate to use boldface type in a section heading; see MOS:BOLD.\n";
									error_string_list.push(error_string);
									sibling_node.style.cssText = "background-color:red";
								}
							} // closes check for child nodes in span node

							// Check for italics in section name
							child_nodes = temp_span_node.getElementsByTagName("I");
							if (child_nodes) { 
								num_child_nodes = child_nodes.length;
								if (num_child_nodes > 0) { 
									num_errors++; 
									error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" has italics formatting.\n";
									error_string += "\tPlease use italics only for titles of longer works and similar uses; see MOS:ITALICS.\n";
									error_string_list.push(error_string);
									sibling_node.style.cssText = "background-color:red";
								}
							} // closes check for child nodes in span node
						}
					} // closes loop over span nodes
				}
			}
			if (apparent_section_name != section_name.replace(/(_+)/ig, " ")) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" does not agree with its apparent section heading \"" + apparent_section_name + "\".\n";
				error_string += "\tThis may indicate a bad character or a repeated section heading.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			}

			// Check for repeats with earlier section headings including article title (section 0)
			for (section_name_index=0; section_name_index<=num_section_names; section_name_index++) { 
				if (section_name.indexOf(section_name_list) == 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" repeats an earlier section heading \"" + section_name_list + "\" (index " + section_name_index + ").\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} // closes loop over prior section names
			num_section_names++;
			section_name_list.push(apparent_section_name);

			// Check for final colons and other punctuation
			if (section_name.match(/:$/)) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" should not end in a colon.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			}

			// Check for punctuation generally
			if (apparent_section_name.match(//g)) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + apparent_section_name + "\" has punctuation or non-English characters.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			}
			if ((apparent_section_name.match(/\s\-/g)) || (apparent_section_name.match(/\-\s/g))) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + apparent_section_name + "\" has a spaced hyphen.\n";
				error_string += "\tPlease use hyphens only for compound nouns and adjectives in section headings.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			}
			if ((apparent_section_name.match(/\s–/g)) || (apparent_section_name.match(/–\s/g))) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + apparent_section_name + "\" has a spaced en-dash.\n";
				error_string += "\tPlease use en-dashes only for compound nouns and adjectives in section headings.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			}

			// Check for initial capital letter
			if (!section_name.match(/^/)) { 
				num_errors++; 
				error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" does not begin with a capital letter or a digit.\n";
				error_string += "\tPlease capitalize the first word of the heading, but no other words.\n";
				error_string_list.push(error_string);
				sibling_node.style.cssText = "background-color:red";
			}

			words = apparent_section_name.split(' ');
			if (words) { 
				num_words = words.length;
				if (num_words > 0) { 
					if (num_words > 9) { 
						num_errors++; 
						error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" has more than nine words (" + num_words + " words).\n";
						error_string_list.push(error_string);
						sibling_node.style.cssText = "background-color:red";
					}

					for (word_index=0; word_index<num_words; word_index++) {
						if ((word_index > 0) && (words.match(/^/)) && (!words.match(/:$/))) { 
							num_errors++; 
							error_string = "ERROR " + num_errors + ": Word \"" + words + "\" in H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" is capitalized.\n";
							error_string += "\tPlease capitalize only the first word of a section heading, unless a proper name.\n";
							error_string_list.push(error_string);
							sibling_node.style.cssText = "background-color:red";	
						}
						temp_word = words.substr(1);
						if (!temp_word) { continue; }
						if (temp_word.match(//))  { 
							num_errors++; 
							error_string = "ERROR " + num_errors + ": Word \"" + words + "\" in H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" has internal capital letters.\n";
							error_string_list.push(error_string);
							sibling_node.style.cssText = "background-color:red";							
						}
					} // closes loop checking the individual words

					first_word = words.toLowerCase();
					for (word_index=0; word_index<num_forbidden_words; word_index++) {
						forbidden_word = forbidden_first_words_in_section_headings;
						if (first_word == forbidden_word) {
							num_errors++; 
							error_string = "ERROR " + num_errors + ": H" + anchor_level + " section \"" + section_name.replace(/(_+)/ig, " ") + "\" begins with a forbidden word \"" + forbidden_word + "\".\n";
							switch (forbidden_word) {
 								case "a":
								case "an":
									error_string += "\tPlease do not start a section heading with an indefinite article such as \"" + forbidden_word + "\".\n";
							 		break;
 								case "the":
									error_string += "\tPlease do not start a section heading with an definite article such as \"" + forbidden_word + "\".\n";
							 		break;
 								case "in":
								case "on":
								case "for":
								case "out":
								case "with":
								case "from":
								case "about":
								case "around":
								case "through":
								case "without":
								case "against":
									error_string += "\tPlease do not start a section heading with a preposition such as \"" + forbidden_word + "\".\n";
							 		break;

								case "concerning":
									error_string += "\tPlease do not start a section heading with a verb participle such as \"" + forbidden_word + "\".\n";
							 		break;
								case "since":
								case "while":
								case "during":
								case "because":
								case "throughout":
									error_string += "\tPlease do not start a section heading with a conjunction such as \"" + forbidden_word + "\".\n";
							 		break;
								case "my":
								case "your":
								case "yours":
								case "his":
								case "her":
								case "hers":
								case "its":
								case "our":
								case "their":
								case "I":
								case "me":
								case "you":
								case "he":
								case "him":
								case "she":
								case "it":
								case "we":
								case "us":
								case "they":
								case "them":
									error_string += "\tPlease do not start a section heading with a pronoun such as \"" + forbidden_word + "\".\n";
							 		break;
							} // closes switch on the forbidden word
							error_string_list.push(error_string);
							sibling_node.style.cssText = "background-color:red";
							break; // break out of loop over forbidden words
						}
					}
				} // closes check on num_words in section heading
			} // closes check on num_words in section heading
		} // closes check for section anchor 


//Check major section headings for closing sections
		if (anchor_level == 2) { 
			num_H2_anchors++;

			if (section_name.match(/See_also/ig)) { 
				num_See_also_sections++;
				if (num_See_also_sections > 1) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section \"" + section_name.replace(/(_+)/ig, " ") + "\" makes " + num_See_also_sections + " \"See also\" sections.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (!section_name.match(/^See_also$/ig)) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" does not match correct form \"See also\".\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Notes_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Notes\" (or \"Footnotes\") section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_References_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"References\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Bibliography_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Bibliography\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Further_reading_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Further reading\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_External_links_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"External links\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} else if ((section_name.match(/Note/ig)) || (section_name.match(/Footnote/ig))) { 
				num_Notes_sections++;
				if (num_Notes_sections > 1) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section \"" + section_name.replace(/(_+)/ig, " ") + "\" makes " + num_Notes_sections + " \"Notes\" (\"Footnotes\") sections.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if ((!section_name.match(/^Note$/i)) && (!section_name.match(/^Notes$/i)) && (!section_name.match(/^Footnote$/i)) && (!section_name.match(/^Footnotes$/i)) && (!section_name.match(/^Notes_and_references$/i)) && (!section_name.match(/^Footnotes_and_references$/i)) && (!section_name.match(/^References_and_notes$/i)) && (!section_name.match(/^References_and_footnotes$/i))) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" does not match correct forms \"Note\", \"Notes\", \"Footnote\", \"Footnotes\", \"Notes and references\" , \"Footnotes and references\", \"References and notes\" or \"References and footnotes\".\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_References_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"References\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Bibliography_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Bibliography\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Further_reading_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Further reading\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_External_links_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"External links\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} else if (section_name.match(/Reference/ig)) { 
				num_References_sections++;
				if (num_References_sections > 1) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section \"" + section_name.replace(/(_+)/ig, " ") + "\" makes " + num_References_sections + " \"References\" sections.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if ((!section_name.match(/^Reference$/ig)) && (!section_name.match(/^References$/ig))) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" does not match correct forms \"Reference\" or \"References\".\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Bibliography_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Bibliography\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Further_reading_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Further reading\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_External_links_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"External links\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} else if (section_name.match(/Bibliography/ig)) { 
				num_Bibliography_sections++;
				if (num_Bibliography_sections > 1) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section \"" + section_name.replace(/(_+)/ig, " ") + "\" makes " + num_Bibliography_sections + " \"Bibliography\" sections.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (!section_name.match(/^Bibliography$/ig)) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" does not match correct form \"Bibliography\".\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_Further_reading_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"Further reading\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_External_links_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"External links\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} else if (section_name.match(/Further_reading/ig)) { 
				num_Further_reading_sections++;
				if (num_Further_reading_sections > 1) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section \"" + section_name.replace(/(_+)/ig, " ") + "\" makes " + num_Further_reading_sections + " \"Further reading\" sections.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (!section_name.match(/^Further_reading$/ig)) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" does not match correct form \"Further reading\".\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if (num_External_links_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": The section \"" + section_name.replace(/(_+)/ig, " ") + "\" should come before the \"External links\" section.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} else if (section_name.match(/External_link/ig)) { 
				num_External_links_sections++;
				if (num_External_links_sections > 1) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section \"" + section_name.replace(/(_+)/ig, " ") + "\" makes " + num_External_link_sections + " \"External_links\" sections.\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}

				if ((!section_name.match(/^External_link$/ig)) && (!section_name.match(/^External_links$/ig))) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" does not match correct forms \"External_link\" or \"External_links\".\n";
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} else { 
				if (num_See_also_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" comes after a \"See also\" section.\n";
					error_string += "\tPlease put this before closing sections such as \"See also\", \"References\" and \"External links\".\n"; 
					error_string_list.push(error_string); 
					sibling_node.style.cssText = "background-color:red";
				}
				if (num_References_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" comes after a \"References\" section.\n";
					error_string += "\tPlease put this before closing sections such as \"See also\", \"References\" and \"External links\".\n"; 
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
				if (num_Bibliography_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" comes after a \"Bibliography\" section.\n";
					error_string += "\tPlease put this before closing sections such as \"See also\", \"References\" and \"External links\".\n"; 
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
				if (num_Further_reading_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" comes after a \"Further reading\" section.\n";
					error_string += "\tPlease put this before closing sections such as \"See also\", \"References\" and \"External links\".\n"; 
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
				if (num_External_links_sections > 0) { 
					num_errors++; 
					error_string = "ERROR " + num_errors + ": Section heading \"" + section_name.replace(/(_+)/ig, " ") + "\" comes after an \"External links\" section.\n";
					error_string += "\tPlease put this before closing sections such as \"See also\", \"References\" and \"External links\".\n"; 
					error_string_list.push(error_string);
					sibling_node.style.cssText = "background-color:red";
				}
			} // closes check for the closing sections
		} // closes check for H2 anchor
	} // closes loop over the anchors

// List the section headings for debugging
	alert_string = "This article has " + num_section_names + " section headings.\n\n";
	alert_string += "\tArticle title: " + article_title + "\n\nSections:\n";
	for (section_name_index=1; section_name_index<=num_section_names; section_name_index++) { 
		alert_string += "\t" + section_name_index + ". " + section_name_list + "\n";
	}
	window.alert(alert_string);

// Print summary of section-heading errors
	if (num_errors < 1) {
		error_string = "No errors in heading levels and order of sections.\n";
		window.alert(error_string); 
		return;
	} else if (num_errors == 1) { 
		initial_error_string = "There is one potential MoS error in the section headings";
	} else { 
		initial_error_string = "There are " + num_errors + " potential MoS errors in the section headings";
	}
	error_string = initial_error_string + ":\n\n";
	for (error_index=0; error_index<num_errors; error_index++) { 
		if ((error_index%max_num_errors_per_alert == 0) && (error_index > 1)) { 
			error_string += "\n\t\t\t\tContinued on next screen...\n";
			window.alert(error_string); 
			error_string = initial_error_string + " (continued from previous screen):\n\n";
		}
		error_string += error_string_list;
	} // closes loop over errors
	error_string += "\nYou should also check that:\n";
	error_string += "\t1. The section headings are nouns or noun phrases.\n";
	error_string += "\t2. The section headings do not refer to the article title or other section headings.\n";
	window.alert(error_string);

} // closes function checkSectionHeadings()


//******************
// The Main Function
//******************

function checkManualOfStyle() { 

	checkSectionHeadings(); // MOS:HEAD

} // closes function checkManualOfStyle()


addOnloadHook(function () {
mw.util.addPortletLink('p-navigation', 'javascript:checkManualOfStyle()', 'Check MOS:HEAD', 'ca-moscheck', 'Checks for violations of the Manual of Style on section headings', '', '');
});
 
//</pre>