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Filename : scrollup.js
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/*
 * 
 * scrollup 
 * Url: http://markgoodyear.com/labs/scrollup/
 * v2.4.1
 * 
 */
! function(l, o, e) {
    "use strict";
    l.fn.scrollUp = function(o) {
        l.data(e.body, "scrollUp") || (l.data(e.body, "scrollUp", !0), l.fn.scrollUp.init(o))
    }, l.fn.scrollUp.init = function(r) {
        var s, t, c, i, n, a, d, p = l.fn.scrollUp.settings = l.extend({}, l.fn.scrollUp.defaults, r),
            f = !1;
        switch (d = p.scrollTrigger ? l(p.scrollTrigger) : l("<a/>", {
            id: p.scrollName,
            href: "#top"
        }), p.scrollTitle && d.attr("title", p.scrollTitle), d.appendTo("body"), p.scrollImg || p.scrollTrigger || d.html(p.scrollText), d.css({
            display: "none",
            position: "fixed",
            zIndex: p.zIndex
        }), p.activeOverlay && l("<div/>", {
            id: p.scrollName + "-active"
        }).css({
            position: "absolute",
            top: p.scrollDistance + "px",
            width: "100%",
            borderTop: "1px dotted" + p.activeOverlay,
            zIndex: p.zIndex
        }).appendTo("body"), p.animation) {
            case "fade":
                s = "fadeIn", t = "fadeOut", c = p.animationSpeed;
                break;
            case "slide":
                s = "slideDown", t = "slideUp", c = p.animationSpeed;
                break;
            default:
                s = "show", t = "hide", c = 0
        }
        i = "top" === p.scrollFrom ? p.scrollDistance : l(e).height() - l(o).height() - p.scrollDistance, n = l(o).scroll(function() {
            l(o).scrollTop() > i ? f || (d[s](c), f = !0) : f && (d[t](c), f = !1)
        }), p.scrollTarget ? "number" == typeof p.scrollTarget ? a = p.scrollTarget : "string" == typeof p.scrollTarget && (a = Math.floor(l(p.scrollTarget).offset().top)) : a = 0, d.click(function(o) {
            o.preventDefault(), l("html, body").animate({
                scrollTop: a
            }, p.scrollSpeed, p.easingType)
        })
    }, l.fn.scrollUp.defaults = {
        scrollName: "scrollUp",
        scrollDistance: 300,
        scrollFrom: "top",
        scrollSpeed: 300,
        easingType: "linear",
        animation: "fade",
        animationSpeed: 200,
        scrollTrigger: !1,
        scrollTarget: !1,
        scrollText: "Scroll to top",
        scrollTitle: !1,
        scrollImg: !1,
        activeOverlay: !1,
        zIndex: 2147483647
    }, l.fn.scrollUp.destroy = function(r) {
        l.removeData(e.body, "scrollUp"), l("#" + l.fn.scrollUp.settings.scrollName).remove(), l("#" + l.fn.scrollUp.settings.scrollName + "-active").remove(), l.fn.jquery.split(".")[1] >= 7 ? l(o).off("scroll", r) : l(o).unbind("scroll", r)
    }, l.scrollUp = l.fn.scrollUp
}(jQuery, window, document);