/*
Behaviour v1.1 by Ben Nolan, June 2005. Based largely on the work
of Simon Willison (see comments by Simon below).
Description:
Uses css selectors to apply javascript behaviours to enable
unobtrusive javascript in html documents.
Usage:
var myrules = {
	'b.someclass' : function(element){
		element.onclick = function(){
			alert(this.innerHTML);
		}
	},
	'#someid u' : function(element){
		element.onmouseover = function(){
			this.innerHTML = "BLAH!";
		}
	}
};

Behaviour.register(myrules);
	// Call Behaviour.apply() to re-apply the rules (if you
	// update the dom, etc).

License: This file is entirely BSD licensed.
More information: http://ripcord.co.nz/behaviour/
*/
var Behaviour = {
	list : new Array,
	register : function(sheet){
		Behaviour.list.push(sheet);
	},
	start : function(){
		Behaviour.addLoadEvent(function(){
			Behaviour.apply();
		});
	},
	apply : function(){
		for (h=0;sheet=Behaviour.list[h];h++){
			for (selector in sheet){
				list = document.getElementsBySelector(selector);
				if (!list){continue;}
				for (i=0;element=list[i];i++){sheet[selector](element);}
			}
		}
	},

	addLoadEvent : function(func){
		var oldonload = window.onload;
		if (typeof window.onload != 'function') {
			window.onload = func;
		} else {
			window.onload = function() {
				oldonload();
				func();
			}
		}
	}
}

Behaviour.start();

function getAllChildren(e) {
	return e.all ? e.all : e.getElementsByTagName('*');
}

document.getElementsBySelector = function(selector) {
	if (!document.getElementsByTagName) {
		return new Array();
	}
	var tokens = selector.split(' ');
	var currentContext = new Array(document);
	for (var i = 0; i < tokens.length; i++) {
		token = tokens[i].replace("/^\s+/,'').replace(/\s+$/,''");;
		if (token.indexOf('#') > -1) {
			var bits = token.split('#');
			var tagName = bits[0];
			var id = bits[1];
			var element = document.getElementById(id);
			if (tagName && element.nodeName.toLowerCase() != tagName) {
				return new Array();
			}
			currentContext = new Array(element);
			continue;
		}
		if (token.indexOf('.') > -1) {
			var bits = token.split('.');
			var tagName = bits[0];
			var className = bits[1];
			if (!tagName) {tagName = '*';}
			var found = new Array;
			var foundCount = 0;
			for (var h = 0; h < currentContext.length; h++) {
				var elements;
				if (tagName == '*') {
					elements = getAllChildren(currentContext[h]);
				} else {
					elements = currentContext[h].getElementsByTagName(tagName);
				}
				for (var j = 0; j < elements.length; j++) {
					found[foundCount++] = elements[j];
				}
			}
			currentContext = new Array;
			var currentContextIndex = 0;
			for (var k = 0; k < found.length; k++) {
			if (found[k].className && found[k].className.match(new RegExp('\\b'+className+'\\b'))) {
				currentContext[currentContextIndex++] = found[k];
			}
		}
		continue;
	}
	if (token.match('/^(\w*)\[(\w+)([=~\|\^\$\*]?)=?"?([^\]"]*)"?\]$/')) {
		var tagName = RegExp.$1;
		var attrName = RegExp.$2;
		var attrOperator = RegExp.$3;
		var attrValue = RegExp.$4;
		if (!tagName) {tagName = '*';}
		var found = new Array;
		var foundCount = 0;
		for (var h = 0; h < currentContext.length; h++) {
			var elements;
			if (tagName == '*') {
				elements = getAllChildren(currentContext[h]);
			} else {
				elements = currentContext[h].getElementsByTagName(tagName);
		}
		for (var j = 0; j < elements.length; j++) {found[foundCount++] = elements[j];}
	}
	currentContext = new Array;
	var currentContextIndex = 0;
	var checkFunction;
	switch (attrOperator) {
		case '=': // Equality
			checkFunction = function(e) { return (e.getAttribute(attrName) == attrValue); };
			break;
		case '~': // Match one of space seperated words
			checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('\\b'+attrValue+'\\b'))); };
			break;
		case '|': // Match start with value followed by optional hyphen
			checkFunction = function(e) { return (e.getAttribute(attrName).match(new RegExp('^'+attrValue+'-?'))); };
			break;
		case '^': // Match starts with value
			checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) == 0); };
			break;
		case '$': // Match ends with value - fails with "Warning" in Opera 7
			checkFunction = function(e) { return (e.getAttribute(attrName).lastIndexOf(attrValue) == e.getAttribute(attrName).length - attrValue.length); };
			break;
		case '*': // Match ends with value
			checkFunction = function(e) { return (e.getAttribute(attrName).indexOf(attrValue) > -1); };
			break;
		default :
			checkFunction = function(e) { return e.getAttribute(attrName); };
	}
	currentContext = new Array;
	var currentContextIndex = 0;
	for (var k = 0; k < found.length; k++) {
		if (checkFunction(found[k])) {currentContext[currentContextIndex++] = found[k];}
	}
	continue; // Skip to next token
	}

    if (!currentContext[0]){return;}

    tagName = token;
    var found = new Array;
	var foundCount = 0;
	for (var h = 0; h < currentContext.length; h++) {
		var elements = currentContext[h].getElementsByTagName(tagName);
		for (var j = 0; j < elements.length; j++) {found[foundCount++] = elements[j];}
	}
		currentContext = found;
	}
	return currentContext;
}