function new_window(url, width, height) 
{ 
   var left = 100;
   var top = 100;
   var winspec = "toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=" + width + ",height=" + height + ",left=" + left + ",top=" + top;

   link = window.open(url,"Link",winspec); 

}