function expand (obj) 
	{
	obj.style.overflow = "visible";
	obj.style.background = "#000";
	obj.style.opacity = "0.5";
	obj.style.filter = "alpha(opacity=50)";
	obj.style.height = "auto";
	}

function fold (obj) 
	{
	obj.style.height = "25px";
	obj.style.background = "transparent";
	obj.style.opacity = "1";
	obj.style.filter = "alpha(opacity=100)";
	obj.style.overflow = "hidden";
	}
function extranav (obj) 
	{
	obj.style.visibility= "visible" ;
	}

function extranav (obj) 
	{
	obj.style.visibility= "hidden" ;
	}