Javascript with ajax, non-ajax

non - ajax:

http_request.open('GET', url, false);
http_request.send(null);

return processSites(http_request.responseText);

function showSites()
{
if (http_request)
{

num = getSites(iCounter+1,100,1)
iCounter +=num;
if (num==100)
tmout = setTimeout(showSites,1000);
else
{
document.getElementById("debugload").innerHTML = objectIx;
iCounter = 0
}
}
}

ajax:

http_request.open('GET', url, true);
http_request.send(null);