使用方法：
$(‘被点击元素选择器’).scrollTo(‘目标’，‘speed’，‘setting’ )；
$.scrollTo(‘目标’，‘speed’，‘setting’ );//网页初始化后立刻滚动
目标选择器可以使选择器，‘top’， ‘bottom’
速度初始为800
设定 axis: 可选设定'xy'：横向纵向都滚动。
'x'：横向滚动
'y'：纵向滚动
easing：滚动效果（jQuery内置效果），默认滑动
页面代码
<html><head>
<title></title>
<script src="js/wjb/lib/jquery-1.3.2.min.js" type="text/javascript"></script>
<script src="js/wjb/ext/jquery.scrollto.js" type="text/javascript"></script>
<script type="text/javascript" language="javascript">
function goto(id) {
$("#" + id).ScrollTo(800);
}
</script>
</head>
<body>
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<a id="haha" style="color:Red;cursor:pointer;" οnclick="javascript:goto('hehe');return false;">我跳↓</a>
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<div id="hehe" style="color:Red;cursor:pointer;" οnclick="javascript:goto('haha');return false;">我再跳↑</div>
</body>
</html>
jquery.scrollto.js 内容如下：
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);
};