Maximize Browser Window - potatoscript/javascript GitHub Wiki

window.onload = function (e) {
    window.moveTo(0, 0);
    if (document.all) {
        top.window.resizeTo(screen.availWidth, screen.availHeight);
    }
    else if (document.layers || document.getElementById) {
        if (top.window.outerHeight < screen.availHeight ||
            top.window.outerWidth < screen.availWidth) {
            top.window.outerHeight = screen.availHeight;
            top.window.outerWidth = screen.availWidth;
        }
    }
}