function createXMLHttp()
{
if(typeof XMLHttpRequest != "undefined")
{
return new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
var aVersions = ["MSXML2.XMLHttp.5.0","MSXML2.XMLHttp.4.0","MSXML2.XMLHttp.3.0","MSXML2.XMLHttp","Microsoft.XMLHttp"];
for(var i=0;i<aVersions.length; i++)
{
try
{
var oXmlHttp = new ActiveXObject(aVersions[i]);
return oXmlHttp;
}
catch(oError)
{
}
}
}
throw new Error("MSXML is not installed.");
}

function getFormParams(oForm)
{
var aParams = new Array();
for(var i=0;i<oForm.elements.length;i++)
{
var sParam = encodeURIComponent(oForm.elements[i].name);
sParam+="=";
sParam+=encodeURIComponent(oForm.elements[i].value);
aParams.push(sParam);
}
return aParams.join("&");
}