function createXmlHttpRequestObject()
{
	var xmlHttp;
	try
	{
		xmlHttp = new XMLHttpRequest;
	}catch(e)
	{
		var XmlHttpVersions = new Array(
		"MSXML2.XMLHTTP.6.0",
		"MSXML2.XMLHTTP.5.0",
		"MSXML2.XMLHTTP.4.0",
		"MSXML2.XMLHTTP.3.0",
		"MSXML2.XMLHTTP",
		"Microsoft.XMLHTTP"
		)
		for (var i=0; i<XmlHttpVersions.length && !xmlHttp; i++)
		{
			try
			{
				xmlHttp = new ActiveXObject(XmlHttpVersions[i]);
			}catch(e)
			{
				xmlHttp = false;
			}
		}
	}
	if (!xmlHttp)
	{
		alert('Error creating XMLHttpRequest');
	}else
	{
		return xmlHttp;
	}
}