function createXMLHTTP()
{
var ajax;
	try
	{
	ajax = new XMLHttpRequest();
	}
	catch(e)
	{
	try
	{
	ajax = new ActiveXObject("Msxml2.XMLHTTP");
	}
	catch(ex)
	{
	try
	{
	ajax =  new ActiveXObject("Microsoft.XMLHTTP");
	}
	catch(exc)
	{
	ajax = false;
	}
	}
	}
	return ajax;
}