function Enlarge(url)
{
  w = 790; h = 529;
  var sw = screen.width;
  var sh = screen.height;
  var x = Math.ceil((sw - w) / 2);
  var y = Math.ceil((sh - h) / 2);
  
  FT = "dependent=1, scrollbars=1, alwaysRaised=1, menubar=0, Width="+w+", Height="+h+", Left="+x+", Top="+y;
  var pic=window.open(url, "Image", FT);
}

function winop()

{
windop = window.open("mail.htm","mywin","width=550,height=490,left=100,top=30");
}