var url = '';
 
function load() {
   url = document.getElementById('image').src;
   setInterval('refresh_img()', 1000);
}
 
function refresh_img() {
   var ndate = new Date();
   var nocache = ndate.getTime();
 
	// + setDebug   document.getElementById('debug').innerHTML = url + '?' + nocache;
   document.getElementById('image').src = url + '?' + nocache;
}

var previousOnload = window.onload;
window.onload = function () { if(previousOnload) previousOnload(); load(); }