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(function(){
	//ADS命名空间
	if(!window.ADS){ window['ADS'] = {}}

	function isCompatible(other){
		if(other == false
			|| !Array.prototype.push 
			|| !Object.hasOwnProperty 
			|| !document.createElement
			|| !document.getElementsByTagName){
			return false;
		}

		return true;
	};
	window['ADS']['isCompatible'] = isCompatible;

	function $(){
		var elements = new Arry();

		for(var i = 0;i < arguments.length; i++){
			var element = arguments[i];

			if(typeof element == 'string'){
				element = document.getElementById(element);
			}

			if(arguments.length == 1){
				return element;
			}

			elements.push(element);
		}

		return elements;
	};
	window['ADS']['$'] = $;

	function addEvent(node,type,listener){
		if(!isCompatible()){return false};

		if(!(node = $(node))){return false;};

		if(node.addEventListener){
			node.addEventListener(type,listener,false);
			return true;
		}else if(node.attachEvent){
			node['e' + type + listener] = listener;
			node[type + listener] = function(){
				node['e' + type + listener] = listener;
			}
			node.attachEvent('on'+type,node[type + listener]);
			return true;
		}

		return false;
	};
	window['ADS']['addEvent'] = addEvent;

	function removeEvent(node,type,listener){
		if(!(node = $(node))){return false;}

		if(node.removeEventListener){
			node.removeEventListener(type,listener,false);
			return true;
		}else if(node.detachEvent){
			node.detachEvent('on' + type,node[type + listener]);
			node[type + listener] = null;
			return true;
		}

		return false;
	};
	window['ADS']['removeEvent'] = removeEvent;

	function getElementByClassName(className,tag,parent){
		parent = parent || document;
		if(!(parent = $(parent))){return false;}

		var allTags = (tag == "*" && parent.all) ? parent.all : parent.getElementByTagName(tag);
		var matchingElements = new Array();

		className = className.replace(/\-/g,"\\-");
		var regex = new RegExp("(^|\\s)" + className + "(\\s|$)");

		var element;
		for(var i=0; i < allTags.length; i++){
			element = allTags[i];
			if(regex.test(element.className)){
				matchingElements.push(element);
			}
		}

		return matchingElements;
	};
	window['ADS']['getElementByClassName'] = getElementByClassName;

	function toggleDisplay(node,value){
		if(!(node = $(node))){return false;}

		if(node.style.display != 'none'){
			node.style.display = 'none';
		}else{
			node.style.display = value || '';
		}
	};
	window['ADS']['toggleDisplay'] = toggleDisplay;

	function insertAfter(node,referenceNode){
		if(!(node = $(node))){return false;}
		if(!(referenceNode = $(referenceNode))) return false;
		return referenceNode.parentNode.insertBefore(node,referenceNode.nextSibling);
	};
	window['ADS']['insertAfter'] = insertAfter;

	function removeChildren(parent){
		if(!(parent = $(parent))) return false;

		while(parent.firstChild){
			parent.firstChild.parentNode.removeChild(parent.firstChild);
		}

		return parent;
	};
	window['ADS']['removeChildren'] = removeChildren;

	function prependChild(parent,newChild){
		if(!(parent = $(parent))) return false;
		if(!(newChild = $(newChild))) return false;

		if(parent.firstChild){
			parent.insertBefore(newChild,parent.firstChild);
		}else{
			parent.appendChild(newChild);
		}

		return parent;
	};
	window['ADS']['prependChild'] = prependChild;
})();