var xmlhttp


function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  // code for IE7+, Firefox, Chrome, Opera, Safari
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  // code for IE6, IE5
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}


function call_sub(halaman_id)
{
	var vsid=Math.random();
	xmlhttp=GetXmlHttpObject();
	if (xmlhttp==null)
	{
		alert ("Your browser does not support XMLHTTP!");
		return;
	}
	var url="responseSubmenu.php";
	url=url+"?halaman_curr="+halaman_id;
	url=url+"&sid="+vsid;
	xmlhttp.onreadystatechange=stateChanged;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}

function stateChanged()
{
	if (xmlhttp.readyState==4)
	{
		data=xmlhttp.responseText;
		if(data.length!=0)
		{document.getElementById("subMenu").innerHTML=data;}
		else
		{
			document.getElementById("subMenu").innerHTML=" ";
		}
	}
}


function show_sub()
{
	document.getElementById("subMenu").style.visibility="visible";
}	
function hide_sub()
{
	document.getElementById("subMenu").style.visibility="hidden";
}