function CreateXMLHTTP()
{
    var xmlHttpRequest;
    if (window.XMLHttpRequest) //For general cases.
    {
        xmlHttpRequest = new XMLHttpRequest();
    }
    else //For IE.
    {
        if (window.ActiveXObject)
        {
            xmlHttpRequest = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttpRequest;
    }