function pop(url,width,height) {
   var w = 600;
   var h = 600;
   var x = Math.random();
   var x = Math.random();
   x *=23;
   x = Math.round(x);
   if (width) w = width;
   if (height) h = height;
   newwindow=window.open(url,'name'+x,'height='+h+',width='+w+',directories=no,top=230,left=230,location=no,menubar=no,status=no,toolbar=no,scrollbars=yes');
   if (window.focus) {newwindow.focus()}
   return false;
}