function show(obj,obj1){
	var obj=document.getElementById(obj);
	if (obj1 != '') var obj1=document.getElementById(obj1);
	
	if(obj.className=="add"){
		obj.className="open";
		if (obj1 != '') obj1.style.display="block";
	}else{
		obj.className="add"
		if (obj1 != '') obj1.style.display="none";
	}
}