function resizeDiscussionIFrame() {
    var screenHeight = window.screen.height;
    var height = (screenHeight > 1024) ? screenHeight + screenHeight * 0.2 : screenHeight;
    var frame = dojo.byId("discussionFrame");
    dojo.style(frame, "height", height + "px");
    dojo.attr(frame, "height", height);
}

dojo.addOnLoad(resizeDiscussionIFrame);