Reload div problem

[godsent]

First i post the code I'm using:

 

function jah_switch(url,target)
{

    if (document.getElementById(target).innerHTML != '')
    {
        document.getElementById(target).innerHTML = '';
    }
    else
    {

        jah(url,target);
    }

}
function jah(url,target) {
    // native XMLHttpRequest object
        document.getElementById(target).innerHTML = '<span class="ajah_waiting"><a href="java script:jah(\''+url+'\',\''+target+'\');">sending...</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 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;
        }
    }
}

 

This suppose to reload my selected div

 

 

setInterval('jah(\'new_page\',\'div\');',5000);

 

but this actually puts a new_page into my div(like iframe) but not reloads it, I'm messed up and i don't really know how to fix.

 

If you know please help me out