/* Common values for the ReadyState of the XMLHttpRequest object */
var READYSTATE_UNINITIALIZED = 0;
var READYSTATE_LOADING = 1;
var READYSTATE_LOADED = 2;
var READYSTATE_INTERACTIVE = 3;
var READYSTATE_COMPLETE = 4;

/* Common values for HTTP status codes */
var HTTPSTATUS_OK = 200;

function CreateXmlHttpRequestObject()
{
    if (window.XMLHttpRequest)
        xmlHttpObj = new XMLHttpRequest();
    else
    {
        try
        {
            xmlHttpObj = new ActiveXObject("Microsoft.XMLHTTP");
        }
        catch (e)
        {
            xmlHttpObj = new ActiveXObject("Msxml2.XMLHTTP");
        }
    }
    
    return xmlHttpObj;
}

function GetResponseText(xmlHttpObj)
{
    if (xmlHttpObj.responseText.indexOf("error:") == 0)
    {
        return "ERROR";
    }
    return xmlHttpObj.responseText.substring("responseText:".length);
}

function GetURL(pageName)
{
    return pageName + "?IdRnd=" + Math.floor(Math.random()*10000);
}