function openWin(mypage, picture, w, h, scroll) { 
    var winl = (screen.width - w) / 2; 
    var wint = (screen.height - h) / 2; 
    winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+',resizable' 
    gallery = window.open(mypage, picture, winprops) 
    if (parseInt(navigator.appVersion) >= 4) { gallery.window.focus(); } 
}