- < script type = " text/javascript " >
- $ ( function (){
- $ ( " #scrollto_bottom " ) . click ( function (){
- $ ( ' #bottom ' ) . ScrollTo ( 800 ) ;
- }) ;
- }) ;
- < / script>
js文件：
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);
};
其实还更简单的办法：
$("html,body").animate({scrollTop: $("#box").offset().top}, 1000);
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