function ShowLargeWindow_2(myImage) {
    leftPos = 20;   // set defaults
    topPos = 20;
    if (screen) {
        leftPos = screen.width / 2 - 250;
        topPos = screen.height / 2 - 350;
    }
    myWindow = window.open(myImage, 'ImageWindow', 'toolbar=no;statusbar=no,menubar=no,titlebar=no,location=no,scrollbars=no,resizable=no,width=550,height=650,left=' + leftPos + ',top=' + topPos + '');
    myWindow.focus();
}