<!--
	
	function show_layer(x)
	{
		if(document.layers)
			document.layers[x].visibility="show";
		else if(document.all)
			document.all[x].style.visibility="visible";
		else
			document.getElementById(x).style.visibility="show";
	}

	function hide_layer(x)
	{
		if(document.layers)
			document.layers[x].visibility="hide";
		else if(document.all)
			document.all[x].style.visibility="hidden";
		else
			document.getElementById(x).style.visibility="hide";
	}

	/* ------------------------------------------------- */
	var old;
	var memold;

	if(document.layers)
	{
		window.captureEvents(Event.MOUSEDOWN);
		window.onmouseup=do_out;
	} else
	{
		document.onmouseup=do_out;
	}


	/* ------------------------------------------------- */
	function do_menu(x)
	{
		if(!old)
			old=memold;

		if(old!=x)
		{
			show_layer(x);
			old=x;
		} else
			old="";
	}


	/* ------------------------------------------------- */
	function do_check(x)
	{
		if(old && old!=x)
		{
			hide_layer(old);
			show_layer(x);
			old=x;
		}
	}


	/* ------------------------------------------------- */
	function do_out()
	{
		if(old)
			hide_layer(old);

		memold=old; old="";
	}
// -->