function getXmlHttpObject()
{
    var xmlHttp = null;

    try
    {
        try
        {
            xmlHttp=new XMLHttpRequest();
        }
        catch (e)
        {
            try
            {
                xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
            }
            catch (e)
            {
                xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
            }
        }
    }
    catch (e)
    {
        xmlHttp = null; //Just in case
    }
    
    return xmlHttp;
}