function w_open()
 {
 url=w_open.arguments[0];
  if (w_open.arguments[1]) 
   {w=w_open.arguments[1];}
  else
   {w=screen.width-10;} 
  if (w_open.arguments[2]) 
   {var h=w_open.arguments[2];}
  else
   {h=screen.height-100;}
  if (w_open.arguments[3]) 
   {var ext=w_open.arguments[3];}
  else
   {var ext="jpg";}
 wn='wname'+Math.round(Math.random()*10000);
 settings='toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no, left=100, top=40 ,width='+w+',height='+h;
 open(url, wn, settings);
 }