function checkParent(src){
while( src!=null ){
if(src.tagName == "LI") return src;
src=src.parentElement;
}
return null;
}

function popup(){
var open=event.srcElement;
var el=checkParent(open);
if(el == null) return;
for(i=0;i < el.children.length; i++){
if(el.children[i].tagName == "DIV") break;
}
if(i == el.children.length) return;
el=el.children[i];
el.style.display = (el.style.display == "" )?"block":""; 
event.cancelBubble = true;
}

var IE=document.all;

if(IE) document.onclick=popup;