var req;

function loadXMLDoc(url) 
{
    // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) 
	{
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", url, true);
        req.send(null);
    	// branch for IE/Windows ActiveX version
    } 
	else if (window.ActiveXObject) 
	{
        req = new ActiveXObject("Microsoft.XMLHTTP");
        
		if (req)
		{
            req.onreadystatechange = processReqChange;
            req.open("GET", url, true);
            req.send();
        }
    }
}