var req;

function loadUrl(url) {
   document.body.style.cursor = 'wait';
   req = window.XMLHttpRequest ?
           new XMLHttpRequest(): new ActiveXObject("Microsoft.XMLHTTP");
   req.onreadystatechange = triggered;
   req.open("GET", url);
   req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
   req.send(null);
}

function triggered() {
   if ((req.readyState == 4) && (req.status == 200)) {
       loadEmptyPhoto();
       txt = req.responseText;
       txt = '<p align=left>' + txt + '</p>';
       document.getElementById("caption").innerHTML = txt;
       document.body.style.cursor = 'auto';
   }
}