function xmlhttpPost(strURL,querystr)
{
	var xmlHttpReq = false;
	var self = this;
	if(window.XMLHttpRequest)
	{
		self.xmlHttpReq= new XMLHttpRequest();
	}
	else if(window.ActiveXObject)
	{
		self.xmlHttpReq= new ActiveXObject("Microsoft.XMLHTTP");
	}
	self.xmlHttpReq.open('POST', strURL, true);
	self.xmlHttpReq.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
	self.xmlHttpReq.onreadystatechange=function(){
		if(self.xmlHttpReq.readyState==4)
		{
			updatepage(self.xmlHttpReq.responseText);
		}
	}
	self.xmlHttpReq.send(querystr);
}