function ShowLayer(DivId,SpanId)
{
	NC = (document.layers);
	IE = (document.all);
	Opera = (document.getElementById);

	if(IE)
	{
		eval('document.all[DivId].style.background = "url(img/menu_bg.gif) repeat-y"');
		eval('document.all[SpanId].style.visibility = "visible"');
	}


	if(NC) 
	{
		eval('document.layers[DivId].background = "url(img/menu_bg.gif) repeat-y"');
		eval('document.layers[SpanId].visibility = "visible"');
	}

	if(Opera)
	{
		eval('document.getElementById(DivId).style.background = "url(img/menu_bg.gif) repeat-y"');
		eval('document.getElementById(SpanId).style.visibility = "visible"');
	}
    return true;
}

function HideLayer(DivId,SpanId)
{
	NC = (document.layers);
	IE = (document.all);
	Opera = (document.getElementById);

	if(IE)
	{
		eval('document.all[DivId].style.background = "url(img/1x1.gif)"');
		eval('document.all[SpanId].style.visibility = "hidden"');
	}


	if(NC) 
	{
		eval('document.layers[DivId].background = "url(img/1x1.gif)"');
		eval('document.layers[SpanId].visibility = "hidden"');
	}

	if(Opera)
	{
		eval('document.getElementById(DivId).style.background = "url(img/1x1.gif)"');
		eval('document.getElementById(SpanId).style.visibility = "hidden"');
	}
    return true;
}