XMLhttp object goes away

[StevenS]

Ok, I'm very new to AJAX programming, and fairly new to Javascript. (I was originally trained on low-level C programming.) I'm trying to build a simple AJAX routine in a file named ajax.js:

var xmlReqs = new Array();
function CXMLHttp(cb,data,xmlHttp)
{
    this.cb = cb;
    this.data = data;
    this.xmlhttp = xmlHttp;
}
 
function ajaxConnect(page,cb,data)
{
    var xmlHttp;
 
    try
    {
        // Firefox, Opera 8.0+, Safari
        xmlHttp=new XMLHttpRequest();
    }
    catch (e)
    {
        // Internet Explorer
        try
        {
            xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch (e)
        {
            try
            {
                xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
            }
            catch (e)
            {
                alert("Your browser does not support AJAX!");
                return false;
            }
        }
    }
    xmlHttp.onreadystatechange=function()
    {
        for (var i=0; i < xmlReqs.length; i++)
        {
            if (xmlReqs[i].xmlhttp.readyState == 4)
            {
                alert('got ' + xmlReqs[i].xmlhttp.responseText);
                xmlReqs[i].cb(xmlReqs[i].data, xmlReqs[i].xmlhttp.responseText);
                xmlReqs.splice(i, 1); i--;
            }
        }
    }
    var i = xmlReqs.push(new CXMLHttp(cb,data,xmlHttp));
    i--;
    xmlReqs[i].xmlhttp.open("GET", page, true);
    xmlReqs[i].xmlhttp.send(null);
}
 

I have an onclick routine that calls this like this:
ajaxConnect('get_item.php?ajax=1&item=' + item, onItem, tem);

The trouble is when it hits the alert, another debugging session shows that the xmlhttp property seems to be empty. I've been staring at this for a day now but I don't see the problem. I know I'm doing some newbie error, but I don't yet see it. Any help?

[gits]

in your onreadystate-handler you loop through a number of request-objects in a callback for every single request ... i think this will cause the behaviour that you encounter ...

kind regards