var d=document;

function exp(e){
	var event_target;
	if(!e){var e = window.event;}
	if(e.target){event_target = e.target;}
	else if(e.srcElement){event_target = e.srcElement;}
	if(event_target.nodeType==3){event_target=event_target.parentNode;}
	if(event_target.tagName.toLowerCase()=="a"){
		li = event_target.parentNode; 
	} else {
		li = event_target;
	}
	
	childmenus = li.getElementsByTagName("ul");
	if(childmenus.length > 0){
		if(event_target.className=="plus"){
			event_target.className="min";
		} else {
			event_target.className="plus";
		}	
		if(childmenus[0].style.display=="none"){
			childmenus[0].style.display="";
		}else{
			childmenus[0].style.display="none"
		}
	}
}

function hideGroups(excl){
	uls = d.getElementById('menu').getElementsByTagName('ul')[0].getElementsByTagName('ul');
	for(i=0,a=uls.length;i<a;i++){
		if(uls[i].id != "menu_"+excl){ 
			uls[i].style.display="none";
		}
	}
}