function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}



//用来存储点击的对象。
var root = "help1";
var old_current;

function switchBgOver(obj){
	obj.style.background="url(images/navbg01.gif) center no-repeat";
}
function switchBgOut(obj,sty){
	obj.style.background= (sty)?"url(" + sty + ")":"";
}

//菜单开始
function mouseMenuOver(obj){
	if(obj==old_current){
		return;
	}else{
		obj.style.background="url(images/left_bg02.gif)";
	}
}
function mouseMenuOut(obj){
	if(obj==getObjById(root)){
		return;
	}else{
		if(obj==old_current){
			return;
		}else{
			obj.style.background="url(images/left_bg01.gif)";
		}
	}
}
function extendNode(obj,current){
	if(root==obj){	//当对象都是同一个的时候，仅执行展开与合上操作。
		var sty = getObjById(obj).style;
		if(sty.display=="none"){
			current.style.background="url(images/left_bg04.gif)";
			sty.display="block";
		}else{
			current.style.background="url(images/left_bg02.gif)";
			sty.display="none";
		}
	}else{	//当对象不是同一个的时候，执行关闭旧对象，展开新对象的操作
		if(root!="help1")
			getObjById(root).style.display="none";
		getObjById(root).style.background="url(images/left_bg01.gif)";
		getObjById(obj).style.display = "block";
		if(old_current){
			old_current.style.background="url(images/left_bg01.gif)";
		}
		current.style.background = "url(images/left_bg04.gif)";
		root = obj;
		old_current = current;
	}
}

function onloadChildMenu(obj){
	var rows = getObjById(obj).rows;
	for(var i = 0; i<rows.length; i++){
		var _cell = rows[i].cells[0];
		_cell.onmouseover=function(){
			if(this.style.background.indexOf("images/bg06.gif") > 0){
				return;
			}else{
				this.style.background="url(images/left_bg06.gif)";
			}
		}
		_cell.onmouseout=function(){
			if(this.getAttribute("hide").indexOf("images/bg06.gif")>0){
				return;
			}else{
				this.style.background="url(images/left_bg05.gif)";
			}
		}
	}
}
//菜单结束

function getObjById(obj){
	if(document.all)
		return document.all(obj);
	return document.getElementById(obj);
}