function popup_window(url,w,h,name)
 {
  var width=w;
  var height=h;
  var from_top=350;
  var from_left=500;
  var toolbar='no';
  var location='no';
  var directories='no';
  var status='no';
  var menubar='no';
  var scrollbars='yes';
  var resizable='yes';
  var atts='width='+width+'show,height='+height+',top='+from_top+',screenY=';
  atts+= from_top+',left='+from_left+',screenX='+from_left+',toolbar='+toolbar;
  atts+=',location='+location+',directories='+directories+',status='+status;
  atts+=',menubar='+menubar+',scrollbars='+scrollbars+',resizable='+resizable;
  var baseURL='';
  if (url.indexOf('http://') != -1){
          baseURL=url.substring(0, url.indexOf('/', 14));//workaround for IE
  }
  window.open(baseURL+url,name,atts);
 }