类似QQ管家会员页面的jquery轮换效果

喜欢看的好的效果收的习惯，最近jquery博客忙着整discuz等php程序，小站有点落下。

类似QQ管家会员页面的jquery轮换效果，具体哪个忘记了，不过蛮喜欢的这种风格，果断趴下，改之。

<script type="text/javascript">// <![CDATA[
/* ==== slider nameSpace ==== */
var slider = function() {
/* ==== private methods ==== */
function getElementsByClass(object, tag, className) {
var o = object.getElementsByTagName(tag);
for ( var i = 0, n = o.length, ret = []; i < n; i++) {
if (o[i].className == className) ret.push(o[i]);
}
if (ret.length == 1) ret = ret[0];
return ret;
}
function setOpacity (obj,o) {
if (obj.filters) obj.filters.alpha.opacity = Math.round(o);
else obj.style.opacity = o / 100;
}
/* ==== Slider Constructor ==== */
function Slider(oCont, speed, iW, iH, oP) {
this.slides = [];
this.over   = false;
this.S      = this.S0 = speed;
this.iW     = iW;
this.iH     = iH;
this.oP     = oP;
this.oc     = document.getElementById(oCont);
this.frm    = getElementsByClass(this.oc, 'div', 'slide');
this.NF     = this.frm.length;
this.resize();
for (var i = 0; i < this.NF; i++) {
this.slides[i] = new Slide(this, i);
}
this.oc.parent = this;
this.view      = this.slides[0];
this.Z         = this.mx;
/* ==== on mouse out event ==== */
this.oc.onmouseout = function () {
this.parent.mouseout();
return false;
}
}
Slider.prototype = {
/* ==== animation loop ==== */
run : function () {
this.Z += this.over ? (this.mn - this.Z) * .5 : (this.mx - this.Z) * .5;
this.view.calc();
var i = this.NF;
while (i--) this.slides[i].move();
},
/* ==== resize  ==== */
resize : function () {
this.wh = this.oc.clientWidth;
this.ht = this.oc.clientHeight;
this.wr = this.wh * this.iW;
this.r  = this.ht / this.wr;
this.mx = this.wh / this.NF;
this.mn = (this.wh * (1 - this.iW)) / (this.NF - 1);
},
/* ==== rest  ==== */
mouseout : function () {
this.over      = false;
setOpacity(this.view.img, this.oP);
}
}
/* ==== Slide Constructor ==== */
Slide = function (parent, N) {
this.parent = parent;
this.N      = N;
this.x0     = this.x1 = N * parent.mx;
this.v      = 0;
this.loaded = false;
this.cpt    = 0;
this.start  = new Date();
this.obj    = parent.frm[N];
this.txt    = getElementsByClass(this.obj, 'div', 'text');
this.img    = getElementsByClass(this.obj, 'img', 'diapo');
this.bkg    = document.createElement('div');
this.bkg.className = 'backgroundText';
this.obj.insertBefore(this.bkg, this.txt);
if (N == 0) this.obj.style.borderLeft = 'none';
this.obj.style.left = Math.floor(this.x0) + 'px';
setOpacity(this.img, parent.oP);
/* ==== mouse events ==== */
this.obj.parent = this;
this.obj.onmouseover = function() {
this.parent.over();
return false;
}
}
Slide.prototype = {
/* ==== target positions ==== */
calc : function() {
var that = this.parent;
// left slides
for (var i = 0; i <= this.N; i++) {
that.slides[i].x1 = i * that.Z;
}
// right slides
for (var i = this.N + 1; i < that.NF; i++) { that.slides[i].x1 = that.wh - (that.NF - i) * that.Z; } }, /* ==== HTML animation : move slides ==== */ move : function() { var that = this.parent; var s = (this.x1 - this.x0) / that.S; /* ==== lateral slide ==== */ if (this.N &#038;& Math.abs(s) > .5) {
this.obj.style.left = Math.floor(this.x0 += s) + 'px';
}
/* ==== vertical text ==== */
var v = (this.N < that.NF - 1) ? that.slides[this.N + 1].x0 - this.x0 : that.wh - this.x0; if (Math.abs(v - this.v) > .5) {
this.bkg.style.top = this.txt.style.top = Math.floor(2 + that.ht - (v - that.Z) * that.iH * that.r) + 'px';
this.v = v;
this.cpt++;
} else {
if (!this.pro) {
/* ==== adjust speed ==== */
this.pro = true;
var tps = new Date() - this.start;
if(this.cpt > 1) {
that.S = Math.max(2, (28 / (tps / this.cpt)) * that.S0);
}
}
}
if (!this.loaded) {
if (this.img.complete) {
this.img.style.visibility = 'visible';
this.loaded = true;
}
}
},
/* ==== light ==== */
over : function () {
this.parent.resize();
this.parent.over = true;
setOpacity(this.parent.view.img, this.parent.oP);
this.parent.view = this;
this.start = new Date();
this.cpt = 0;
this.pro = false;
this.calc();
setOpacity(this.img, 100);
}
}
/* ==== public method - script initialization ==== */
return {
init : function() {
// create instances of sliders here
// parameters : HTMLcontainer name, speed (2 fast - 20 slow), Horizontal ratio, vertical text ratio, opacity
this.s1 = new Slider("slider", 12, 1.84/3, 1/3.2, 70);
setInterval("slider.s1.run();", 16);
}
}
}();
// ]]></script>

有喜欢的，欢迎来拍砖呐。
在线效果DEMO
掉渣的IE6 勿打开
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