Refreshing Div IE7/8 Problems

[x2i]

Hi, I have a code that refreshes a chat box every 10 seconds and it works an absolute treat in Firefox 3.5, however in IE7/8 it doesn't wish to co-operate. It doesn't reload the div and whats worse is that even hitting CTRL+F5 will refresh it properly - yet if you navigate to the page that holds the chat entries outside of the chat box it works - then when you go back to the chatbox it will reload.  Can someone help me out if possible?

 

<script type="text/javascript">
hova = false;
var jahtimer;

function jahDone(target) {
    // only if req is "loaded"
    if (req.readyState == 4) {
        // only if "OK"
        if (req.status == 200) {
            results = req.responseText;
            document.getElementById(target).innerHTML = results;
        } else {
            document.getElementById(target).innerHTML = "jah error:\n" + req.statusText;
        }
    }
}

function jah(url, target) {
    if(hova === false) {
    // native XMLHttpRequest object
        document.getElementById(target).innerHTML = '<span class="ajah_waiting"><a href="java script:jah(\''+url+'\',\''+target+'\');"><br \/><img src=\"images/loadingchat.gif\" style=\"height:30px;width:30px;border:0;\" \/><br \/>Refreshing...<\/a><\/span>';
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = function() {
            jahDone(target);
        };
        req.open("GET", url, true);
        req.send(null);
    // IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = function() {
                jahDone(target);
            };
            req.open("GET", url, true);
            req.send();
        }
    }
  }
}

function startInterval() {
    jah('chatget.php?limit=<?php echo $limit; ?>','chat');
    jahtimer = setInterval('jah(\'chatget.php?limit=<?php echo $limit; ?>\',\'chat\');', 10000);
}

//function jah_switch(url, target) {
    //if (document.getElementById(target).innerHTML !== '') {
        //document.getElementById(target).innerHTML = '';
    //} else {
        //jah(url, target);
    //}
//}
</script>

<div id="chat" align="center"></div>

 

 

The chat box can be located here: http://www.x2i4eva.com/chat.php

[x2i]

Sorry for double posting since I cannot edit my post again ¬_¬

 

When I run it through this website: http://www.jslint.com/

I get this result... I don't know if this is what is causing it but still:

 

 

Implied global: ActiveXObject 31, hova 2 19, req 7 9 10 13 23 24 27 28 31 32 33 36 37, results 10 11, window 22 30

 

Problem at line 45 character 16: Implied eval is evil. Pass a function instead of a string.

 

jahtimer = setInterval('jah(\'chatget.php?limit=<?php echo $limit; ?>\',\...