function menu(obj1,obj2)
	{
	var els1=document.getElementById(obj1);
	var els2=document.getElementById(obj2);

	if (els1.style.display=="none")
		{
		els1.style.display="block";
		els2.src="images/plus1.gif";
		}
	else
		{
		els1.style.display="none";
		els2.src="images/plus0.gif";
		}
	}