function FFshow(url,w,h,x,y)
 {
  opts = "location=0,status=0,scrollbars=1,width="+w+",height="+h;
  mywindow = window.open (url, "FF", opts);
  // mywindow.moveTo(screen.width/2-300,screen.height/2-250);
  mywindow.moveTo(x,y);
  mywindow.focus();
 }