jQuery定位跳转插件 - www.



    function goto(id) {
        $("#" + id).ScrollTo(800);
    }






我跳↓

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

jQuery.fx.ScrollTo = 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);
};