Keeps the window/body from scrolling while you're focused on a fixed/absolute element that also scrolls.

Focus scroll

$('#element').bind('mousewheel DOMMouseScroll', function(e) {
    var scrollTo = null;

    if (e.type == 'mousewheel') {
        scrollTo = (e.originalEvent.wheelDelta * -1);
    }
    else if (e.type == 'DOMMouseScroll') {
        scrollTo = 40 * e.originalEvent.detail;
    }

    if (scrollTo) {
        e.preventDefault();
        $(this).scrollTop(scrollTo + $(this).scrollTop());
    }
});