男士皮衣外套:js脚本问题

用一实现树型目录结构，点击“+”没有反应 目录展开不了。是js脚本错误

function initIt1(){
if(this.name == "idbmainlist"){parent.changeColor('007CD0');}
tableColl=document.all.tags("tr");
for(i=0; i<tableColl.length; i++) {
whichEl=tableColl(i);
if(whichEl.className=="child" && whichEl.id !="$Cookies{which}"){whichEl.style.display="none";}
}
}
function expands1(el) {
expireDate=new Date;
expireDate.setYear(expireDate.getYear()+1);
whichEl1=eval(el+"Child");
whichT1=eval("T"+el);
var wh = (el+"Child");
if (whichEl1.style.display=="none"){
//initIt1();
whichT1.src="../images/bookOpen.gif";
whichEl1.style.display="block";
document.cookie="which="+wh+";expires="+expireDate.toGMTString()+";";
}else{
whichT1.src="../images/bookOpen.gif";
whichEl1.style.display="none";
document.cookie="which="+";expires="+expireDate.toGMTString()+";";
}
}
onload=initIt1;