NS4 = (document.layers) ? 1 : 0;
IE4 = (document.all) ? 1 : 0;
ver4 = (NS4 || IE4) ? 1 : 0;

if (ver4) {
    with (document) {
        write("<STYLE TYPE='text/css'>");
        if (NS4) {
            write(".parent {position:absolute; visibility:visible}");
            write(".child {position:absolute; visibility:visible}");
            write(".regular {position:absolute; visibility:visible}")
        }
        else {
            write(".child {display:none}")
        }
        write("</STYLE>");
    }
}

function getIndex(el) {
    ind = null;
    for (i=0; i<document.layers.length; i++) {
        whichEl = document.layers[i];
        if (whichEl.id == el) {
            ind = i;
            break;
        }
    }
    return ind;
}

function arrange() {
    nextY = document.layers[firstInd].pageY +document.layers[firstInd].document.height;
    for (i=firstInd+1; i<document.layers.length; i++) {
        whichEl = document.layers[i];
        if (whichEl.visibility != "hide") {
            whichEl.pageY = nextY;
            nextY += whichEl.document.height;
        }
    }
}

function initIt(){
    if (!ver4) return;
    if (NS4) {
        for (i=0; i<document.layers.length; i++) {
            whichEl = document.layers[i];
            if (whichEl.id.indexOf("Child") != -1) whichEl.visibility = "hide";
       }
        arrange();
    }
    else {
        divColl = document.all.tags("DIV");
        for (i=0; i<divColl.length; i++) {
            whichEl = divColl(i);
            if (whichEl.className == "child") whichEl.style.display = "none";
        }
    }
}

function expandIt(el) {
    if (!ver4) return;
    if (IE4) {
//sos= (el+"Child");
//alert (sos.style.display);
  divColl = document.all.tags("DIV");//把网页中<div>装入变量divColl中
   
        for (i=0; i<divColl.length; i++)//取得网页中<div>个数
{
            whichEl = divColl(i);
            if (whichEl.className == "child") //判断div的名称为child
        {            
            //alert (whichEl.id);    
            
         whichEl=eval(whichEl.id);        //取得div为child的id名
   
		if (whichEl.style.display == "none") //判断是否显示状态
		  {
            //   whichEl.style.display = "block";		   
          }
        else {    
var sos;
sos=whichEl.id;
                 whichEl.style.display = "none";//如果显示则设为不显示
             }
    
        }
            
}   
     

		whichEl = eval(el + "Child");//获得激活显示的div的id名
   if (sos!=whichEl.id)
{
//         if (whichEl.style.display   

        if (whichEl.style.display == "none") {//判断是否显示状态
           whichEl.style.display = "block";	//如果没有显示则设为显示	   
        }
        else {
            whichEl.style.display = "none";	//如果显示则设为不显示
    
        }
}
		
    }
    
}
//onload = initIt;