window.onload=function() { 
 if (document.getElementById) {  
  document.getElementById('form1').onsubmit=function() {  
   return getURL(document.getElementById('url').value);  
} 
 } 
} 
function getURL(val){ 
 if (val=='') { alert('Please enter a url or file name.'); } 
 else { 
  val = ''+val; 
  var day = new Date(); 
  var id = day.getTime(); 
  var params='width=800,height=800,scrollbars,resizable'; 
  var win=open(val,id,params); 
 } 
 return false; 
}