guwang/www.37bjw.com/js/jquery.hover...

/*
柯乐义
http://keleyi.com
*/

jQuery.getPos = function (e) {
    var l = 0;
    var t = 0;
    var w = jQuery.intval(jQuery.css(e, 'width'));
    var h = jQuery.intval(jQuery.css(e, 'height'));
    var wb = e.offsetWidth;
    var hb = e.offsetHeight;
    while (e.offsetParent) {
        l += e.offsetLeft + (e.currentStyle ? jQuery.intval(e.currentStyle.borderLeftWidth) : 0);
        t += e.offsetTop + (e.currentStyle ? jQuery.intval(e.currentStyle.borderTopWidth) : 0);
        e = e.offsetParent;
    }
    l += e.offsetLeft + (e.currentStyle ? jQuery.intval(e.currentStyle.borderLeftWidth) : 0);
    t += e.offsetTop + (e.currentStyle ? jQuery.intval(e.currentStyle.borderTopWidth) : 0);
    return { x: l, y: t, w: w, h: h, wb: wb, hb: hb };
};
jQuery.getClient = function (e) {
    if (e) {
        w = e.clientWidth;
        h = e.clientHeight;
    } else {
        w = (window.innerWidth) ? window.innerWidth : (document.documentElement && document.documentElement.clientWidth) ? document.documentElement.clientWidth : document.body.offsetWidth;
        h = (window.innerHeight) ? window.innerHeight : (document.documentElement && document.documentElement.clientHeight) ? document.documentElement.clientHeight : document.body.offsetHeight;
    }
    return { w: w, h: h };
};
jQuery.getScroll = function (e) {
    if (e) {
        t = e.scrollTop;
        l = e.scrollLeft;
        w = e.scrollWidth;
        h = e.scrollHeight;
    } else {
        if (document.documentElement && document.documentElement.scrollTop) {
            t = document.documentElement.scrollTop;
            l = document.documentElement.scrollLeft;
            w = document.documentElement.scrollWidth;
            h = document.documentElement.scrollHeight;
        } else if (document.body) {
            t = document.body.scrollTop;
            l = document.body.scrollLeft;
            w = document.body.scrollWidth;
            h = document.body.scrollHeight;
        }
    }
    return { t: t, l: l, w: w, h: h };
};

jQuery.intval = function (v) {
    v = parseInt(v);
    return isNaN(v) ? 0 : v;
};

jQuery.fn.HoverTreeScroll = function (s) {
    o = jQuery.speed(s);
    return this.each(function () {
        new jQuery.fx.HoverTreeScroll(this, o);
    });
};

jQuery.fx.HoverTreeScroll = function (e, o) {
    var z = this;
    z.o = o;
    z.e = e;
    z.p = jQuery.getPos(e);
    z.s = jQuery.getScroll();
    z.clear = function () { clearInterval(z.timer); z.timer = null };
    z.t = (new Date).getTime();
    z.step = function () {
        var t = (new Date).getTime();
        var p = (t - z.t) / z.o.duration;
        if (t >= z.o.duration + z.t) {
            z.clear();
            setTimeout(function () { z.scroll(z.p.y, z.p.x) }, 13);
        } else {
            st = ((-Math.cos(p * Math.PI) / 2) + 0.5) * (z.p.y - z.s.t) + z.s.t;
            sl = ((-Math.cos(p * Math.PI) / 2) + 0.5) * (z.p.x - z.s.l) + z.s.l;
            z.scroll(st, sl);
        }
    };
    z.scroll = function (t, l) { window.scrollTo(l, t) };
    z.timer = setInterval(function () { z.step(); }, 13);
};

/*
http://hovertree.com
*/