<!--
function openWindow(percent) {
    var w = 630, h = 440; // default sizes
    if (window.screen) {
        w = window.screen.availWidth * percent / 100;
        h = window.screen.availHeight * percent / 100;
    }

    window.open('/parents/big-book/default.aspx','windowName','width='+w+',height='+h);
}
//-->