function contentUpdate(id)
{
	xmlHttp = GetXmlHttpObject();
	if ( xmlHttp == null )
	{
		alert( "Browser does not support HTTP request" );
		return;
	}

	var url = "sub.php";
	url = url + "?id=" + id;
	url = url + "&sid=" + Math.random();
	xmlHttp.onreadystatechange = stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged()
{
	if ( xmlHttp.readyState == 4 || xmlHttp.readyState == "complete" )
	{
		document.getElementById('bodycnt').innerHTML = xmlHttp.responseText;
	}
	return true;
}

function GetXmlHttpObject()
{
	var objXMLHttp=null;

	if (window.XMLHttpRequest)
  	{
		objXMLHttp=new XMLHttpRequest();
	}
	else if (window.ActiveXObject)
	{
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP");
	}

	return objXMLHttp;
}