/* Opens a new window centered on the screen */

  var win = null;
  function photoWindow(mypage,myname,w,h,scroll) 
    {
    LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
    TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
    
    settings =
     'width='+w+',height='+h+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable'
    win = window.open(mypage,myname,settings)
    }