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!='iconend'){
		el.className = el.className == "iconplus" ? "iconmin" : "iconplus";
	}
}