https://snt-sosenki.ru/reyting/js/behavior.js

1var Behaviour = {
2	list : new Array,
3	
4	register : function(sheet){
5		Behaviour.list.push(sheet);
6	},
7	
8	start : function(){
9		Behaviour.addLoadEvent(function(){
10			Behaviour.apply();
11		});
12	},
13	
14	apply : function(){
15		for (h=0;sheet=Behaviour.list[h];h++){
16			for (selector in sheet){
17				list = document.getElementsBySelector(selector);
18				
19				if (!list){
20					continue;
21				}
22
23				for (i=0;element=list[i];i++){
24					sheet[selector](element);
25				}
26			}
27		}
28	},
29	
30	addLoadEvent : function(func){
31		var oldonload = window.onload;
32		
33		if (typeof window.onload != 'function') {
34			window.onload = func;
35		} else {
36			window.onload = function() {
37				oldonload();
38				func();
39			}
40		}
41	}
42}
43
44Behaviour.start();
45
46function getAllChildren(e) {
47  // Returns all children of element. Workaround required for IE5/Windows. Ugh.
48  return e.all ? e.all : e.getElementsByTagName('*');
49}
50
51document.getElementsBySelector = function(selector) {
52  // Attempt to fail gracefully in lesser browsers
53  if (!document.getElementsByTagName) {
54    return new Array();
55  }
56  // Split selector in to tokens
57  var tokens = selector.split(' ');
58  var currentContext = new Array(document);
59  for (var i = 0; i < tokens.length; i++) {
60    token = tokens[i].replace(/^\s+/,'').replace(/\s+$/,'');;
61    if (token.indexOf('#') > -1) {
62      // Token is an ID selector
63      var bits = token.split('#');
64      var tagName = bits[0];
65      var id = bits[1];
66      var element = document.getElementById(id);
67      if (tagName && element.nodeName.toLowerCase() != tagName) {
68        // tag with that ID not found, return false
69        return new Array();
70      }
71      // Set currentContext to contain just this element
72      currentContext = new Array(element);
73      continue; // Skip to next token
74    }
75    if (token.indexOf('.') > -1) {
76      // Token contains a class selector
77      var bits = token.split('.');
78      var tagName = bits[0];
79      var className = bits[1];
80      if (!tagName) {
81        tagName = '*';
82      }
83      // Get elements matching tag, filter them for class selector
84      var found = new Array;
85      var foundCount = 0;
86      for (var h = 0; h < currentContext.length; h++) {
87        var elements;
88        if (tagName == '*') {
89            elements = getAllChildren(currentContext[h]);
90        } else {
91            elements = currentContext[h].getElementsByTagName(tagName);
92        }
93        for (var j = 0; j < elements.length; j++) {
94          found[foundCount++] = elements[j];
95        }
96      }
97      currentContext = new Array;
98      var currentContextIndex = 0;
99      for (var k = 0; k < found.length; k++) {
100        if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {
101          currentContext[currentContextIndex++] = found[k];
102        }
103      }
104      continue; // Skip to next token
105    }
106    // Code to deal with attribute selectors
107    if (token.match(/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/)) {
108      var tagName = RegExp.$1;
109      var attrName = RegExp.$2;
110      var attrOperator = RegExp.$3;
111      var attrValue = RegExp.$4;
112      if (!tagName) {
113        tagName = '*';
114      }
115      // Grab all of the tagName elements within current context
116      var found = new Array;
117      var foundCount = 0;
118      for (var h = 0; h < currentContext.length; h++) {
119        var elements;
120        if (tagName == '*') {
121            elements = getAllChildren(currentContext[h]);
122        } else {
123            elements = currentContext[h].getElementsByTagName(tagName);
124        }
125        for (var j = 0; j < elements.length; j++) {
126          found[foundCount++] = elements[j];
127        }
128      }
129      currentContext = new Array;
130      var currentContextIndex = 0;
131      var checkFunction; // This function will be used to filter the elements
132      switch (attrOperator) {
133        case '=': // Equality
134          checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
135          break;
136        case '~': // Match one of space seperated words 
137          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
138          break;
139        case '|': // Match start with value followed by optional hyphen
140          checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
141          break;
142        case '^': // Match starts with value
143          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
144          break;
145        case '$': // Match ends with value - fails with "Warning" in Opera 7
146          checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
147          break;
148        case '*': // Match ends with value
149          checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
150          break;
151        default :
152          // Just test for existence of attribute
153          checkFunction = function(e) { return e.getAttribute(attrName); };
154      }
155      currentContext = new Array;
156      var currentContextIndex = 0;
157      for (var k = 0; k < found.length; k++) {
158        if (checkFunction(found[k])) {
159          currentContext[currentContextIndex++] = found[k];
160        }
161      }
162      // alert('Attribute Selector: '+tagName+' '+attrName+' '+attrOperator+' '+attrValue);
163      continue; // Skip to next token
164    }
165    
166    if (!currentContext[0]){
167    	return;
168    }
169    
170    // If we get here, token is JUST an element (not a class or ID selector)
171    tagName = token;
172    var found = new Array;
173    var foundCount = 0;
174    for (var h = 0; h < currentContext.length; h++) {
175      var elements = currentContext[h].getElementsByTagName(tagName);
176      for (var j = 0; j < elements.length; j++) {
177        found[foundCount++] = elements[j];
178      }
179    }
180    currentContext = found;
181  }
182  return currentContext;
183}