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

function cleanInvalidEle(element){
	for(var i=0;i<element.childNodes.length;i++){
		var node = element.childNodes[i];
		if(node.nodeType!=1)node.parentNode.removeChild(node);
	}
}

function getCurrentd(element,style){//获取当前选中项
	for(i=0;i<element.childNodes.length;i++){
		cleanInvalidEle(element.childNodes[i]);
		var node = element.childNodes[i];
 		if(node.className==style){
			return i;
		}
	} 
}

function getCurrent(element,style){//获取当前选中项
    
	for(i=0;i<element.childNodes.length;i++){
		cleanInvalidEle(element.childNodes[i]);
		var node = element.childNodes[i].childNodes[0];
 		if(node.className==style){
			return i;
		}
	} 
}

function getCurrent2(element,style){//获取当前选中项
   for (i=0;i<element.length;i++)
   {
	   if(element[i].childNodes[0].className==style)return i;
   }
}

function getObject(id,method){
	var nObject;
	if(method =="id"){
		nObject = document.getElementById(id);
	}else if(method =="tag"){
		nObject = document.getElementsByTagName(id);
	}
	return nObject;
}

function setNavSty(){
	if(!document.getElementById) return false;
	var navObj = document.getElementById("unav");
	cleanInvalidEle(navObj);
	subObj = navObj.lastChild;
	cleanInvalidEle(subObj);
	subObj.firstChild.className = "noList";
	
}

function initLeftH(){
	if(!document.getElementById("left"))return false;
	if(!document.getElementById("right"))return false;
    lObj = document.getElementById("left");
	rObj = document.getElementById("right")
	if(rObj.offsetHeight > 570){
      lObj.style.height=rObj.offsetHeight+"px";
	  lObj.style.minHeight=rObj.offsetHeight+"px";
	}else{
	  lObj.style.height="570px";
	  lObj.style.minHeight="570px";
	}
}