// Ajax Library

function createREQ()
{
    try
    {
        req = new XMLHttpRequest(); /* e.g. Firefox */
    }
    catch(err1)
    {
        try
        {
            req = new ActiveXObject('Msxml2.XMLHTTP'); /* some versions IE */
        }
        catch(err2)
        {
            try
            {
                req = new ActiveXObject("Microsoft.XMLHTTP"); /* some versions IE */
            }
            catch(err3)
            {
                req = false;
            }
        }
    }

    return req;
}

function requestGET(url, query, req)
{
    myRand=parseInt(Math.random()*99999999);
    req.open("GET",url+'?'+query+'&rand='+myRand,true);
    req.send(null);
}

function requestPOST(url, query, req)
{
	createREQ();	
    req.open("POST", url,true);
    req.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    req.send(query);
}

function doCallback(callback,item)
{

    eval(callback + '(item)');
}

function doAjax(url,query,callback,reqtype,getxml)
{

    var myreq = createREQ();

    myreq.onreadystatechange = function()
    {
      if(myreq.readyState == 4)
        {
          if(myreq.status == 200)
            {
                var item = myreq.responseText;
                if(getxml==1)
                {
                    item = myreq.responseXML;
                }
                doCallback(callback,item);
            }
        }
    }
    if(reqtype=='post')
    {
        requestPOST(url,query,myreq);
    }
    else
    {
        requestGET(url,query,myreq);
    }
}