function toggleSubLevel(el){	
	cnodes = el.parentNode.childNodes;	
	switchClass(el);	
	for(i=0;i<cnodes.length;i++){
		if(cnodes[i].tagName&&cnodes[i].tagName.toLowerCase() == "ul"){
			switchDisplay(cnodes[i]);					
		}
	}	
}

function switchDisplay(el){
	el.style.display = el.style.display == "none" ? "block" : "none";
}

function switchClass(el){
	if(el.className!='iconItem'){
		el.className = el.className == "iconPlus" ? "iconMin" : "iconPlus";
	}
}