function NewWindow(mypage, myname, 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'

        window.opener = this.window;

        window.open(mypage, myname, winprops);
}