function show(file, width, height) 
   { 
         file=file + ".jpg"; 
         //window.open(file, "_blank", "width="+width+",height="+height+",titlebar=no,toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=no"); 
         window.open(file, "_blank", "width="+width+",height="+height+",titlebar=no,toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes"); 
   };