scrollHelper

(function ($) {
    var mouseScroll = function (e) {
        try {
            var origEvent = e.originalEvent;
            origEvent.preventDefault();
        } catch (err) {
        }
    };
    var mouseWheel = function (e) {
        try {
            e = e || window.event;
            e.preventDefault();
            e.returnValue = false;
        } catch (err) {
        }
    };
    $.fn.preventOuterScroll = function () {
        var element = this.get(0);
        if (navigator.userAgent.toLowerCase().indexOf("firefox") > -1) {
            this.on("DOMMouseScroll", function (e) {
                var origEvent = e.originalEvent;
                element.scrollTop += origEvent.detail > 0 ? 60 : -60;
                origEvent.preventDefault();
            });
        } else {
            element.onmousewheel = function (e) {
                e = e || window.event;
                element.scrollTop += e.wheelDelta > 0 ? -60 : 60;
                e.preventDefault();
                e.returnValue = false;
            };
        }
        return this;
    };
    $.fn.preventScroll = function () {
        var element = this.get(0);
        if (navigator.userAgent.toLowerCase().indexOf("firefox") > -1) {
            this.on("DOMMouseScroll", mouseScroll);
        } else {
            $(element).on("mousewheel", mouseWheel);
        }
        return this;
    };
    $.fn.liveScroll = function() {
        var element = this.get(0);
        if (navigator.userAgent.toLowerCase().indexOf("firefox") > -1) {
            this.off("DOMMouseScroll", mouseScroll);
        } else {
            $(element).off("mousewheel", mouseWheel);
        }
        return this;
    };
}($));