var layerRef = "null", styleSwitch = "null";
var OnDiv = "false";

   HM_DOM = (document.getElementById) ? true : false;
   HM_NS4 = (document.layers) ? true : false; 
   
if (HM_NS4) {
	layerRef = "document.layers";
	styleSwitch = "";
	visiblevar = "show";
	hidevar = "hide";
}else{
	if (HM_DOM)
		{
 			styleSwitch=".style";
			visiblevar="visible";
			hidevar="hidden";
		}
		else 
		{
			layerRef="document.all";
 			styleSwitch=".style";
			visiblevar="visible";
			hidevar="hidden";
		}
  }
 
function showSub (menu)
{
	if (HM_DOM) 
		{
		eval('document.getElementById("'+menu+'")'+styleSwitch+'.visibility=visiblevar');
		eval('document.getElementById("'+menu+'x")'+styleSwitch+'.visibility=visiblevar');
		}
	else
		{
		eval(layerRef+'["'+menu+'"]'+styleSwitch+'.visibility=visiblevar');
		eval(layerRef+'["'+menu+'x"]'+styleSwitch+'.visibility=visiblevar');
		}
}

function hideSub (menu)
{		
	menux = menu;
	t = setTimeout("timecheck (menux)" , 2000);
}

function timecheck (menu)
{
	if (!OnDiv)
	{
	if (HM_DOM) 
		{
		eval('document.getElementById("'+menu+'x")'+styleSwitch+'.visibility=hidevar');
		eval('document.getElementById("'+menu+'")'+styleSwitch+'.visibility=hidevar');
		}
	else
		{
		eval(layerRef+'["'+menu+'"]'+styleSwitch+'.visibility=hidevar');
		eval(layerRef+'["'+menu+'x"]'+styleSwitch+'.visibility=hidevar');
		}
	}
}

function Hide_all()
{
	for (i=1; i<5; i++)
		{
		if (HM_DOM) 
			{
			eval('document.getElementById("menu'+i+'x")'+styleSwitch+'.visibility=hidevar');
			eval('document.getElementById("menu'+i+'")'+styleSwitch+'.visibility=hidevar');
			}
		else
			{
			eval(layerRef+'["'+menu+'"]'+styleSwitch+'.visibility=hidevar');
			eval(layerRef+'["'+menu+'x"]'+styleSwitch+'.visibility=hidevar');
			}
		}
}