var xmlHttp

function ajax_get(url)
{

	xmlHttp=GetXmlHttpObject()
	
	if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 

	xmlHttp.onreadystatechange=stateChanged
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
} 

function stateChanged() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
		recebe(xmlHttp.responseText);
	} 
} 

function GetXmlHttpObject(handler)
{ 
	var objXMLHttp=null
	
	if (window.XMLHttpRequest)
	{
		objXMLHttp=new XMLHttpRequest()
	}
	else if (window.ActiveXObject)
	{
		objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
	}
	return objXMLHttp
}