var last_div="";
function show_div(obj_id){

		if(obj_id!=''){
			var divuletz=document.getElementById(obj_id);
			if(divuletz){
				if(divuletz.style.display=="none"){
					divuletz.style.display="block";
				}
				else{
					divuletz.style.display="none";
				}
			}
		}
		
		if(last_div!="" && last_div!=divuletz){
			if(last_div.style.display=="block"){
				last_div.style.display="none";
			}
		}
		last_div=divuletz;
		return false;
}