var ie4 = (document.all) ? true : false;
var nn4 = (document.layers) ? true : false;


function GetXmlHttpRequest()
{
	if ( typeof XMLHttpRequest != 'undefined' )
	{
		return new XMLHttpRequest();
	}
	try {
		var x = new ActiveXObject("Msxml2.XMLHTTP");
		return x;
	} catch(e){}
	try {
		var x = new ActiveXObject("Microsoft.XMLHTTP");
		return x;
	} catch(e){}
	return null;
}