给网页中添加翻板图片效果
通过javascript 给网页中添加类似microsoft首页翻板图片效果：
html代码：
<div class="content">
<p><span class="flip"> 总标题 </span>
<div id="slider">
<div class="slide">
<a href="http://blog.sina.com.cn/stylesheet"><img class="diapo" src="1.jpg" alt=""></a>
<div class="text">
<span class="title">标题1</span>
</div>
</div>
<div class="slide">
<a href="http://blog.sina.com.cn/stylesheet"><img class="diapo" src="2.jpg" alt="" /> </a>
<div class="text">
<span class="title">标题2</span>
</div>
</div>
<div class="slide">
<a href="http://blog.sina.com.cn/stylesheet"><img class="diapo" src="3.jpg" alt="" /></a>
<div class="text">
<span class="title">标题3</span>
</div>
</div>
<div class="slide">
<a href="http://www.cnblogs.com/stylesheet"><img class="diapo" src="4.jpg" alt=""></a>
<div class="text">
<span class="title">标题4</span>
</div>
</div>
<div class="slide">
<a href="http://www.cnblogs.com/stylesheet"><img class="diapo" src="5.jpg" alt=""></a>
<div class="text">
<span class="title">标题5</span>
</div>
</div>
</div>
<script type="text/javascript">
slider.init();
</script>
</p>
</div>
css代码：
.flip {
font-size: medium;
font-weight:bold;
font-family: Arial, Helvetica, sans-serif;
height:50px;
margin:10px 10px;
paddint:0 5px;
}
#slider {
position:relative;
width: 545px;
height: 200px;
border:#c2daff 6px inset;
overflow: hidden;
}
#slider .slide {
position: absolute;
top: 0px;
height: 200px;
width: 400px;
background: #000;
overflow: hidden;
border-left: #000 solid 1px;
cursor: default;
}
#slider .title {
color: #F80;
font-weight: bold;
font-size: 1.2em;
margin-right: 1.5em;
text-decoration: none;
}
#slider .backgroundText {
position: absolute;
width: 100%;
height: 100%;
top: 100%;
background: #000;
filter: alpha(opacity=40);
opacity: 0.4;
}
#slider .text {
position: absolute;
top: 50%;
color: #FFF;
font-family: verdana, arial, Helvetica, sans-serif;
font-size: 1.0em;
text-align: justify;
width: 370px;
margin-left:10px;
margin-top:10px;
}
#slider .diapo {
position: absolute;
filter: alpha(opacity=100);
opacity: 1;
visibility: hidden;
width:370px;
}
javascript代码：
// JavaScript Document
var slider = function() {
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;
}
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;
this.oc.onmouseout = function () {
this.parent.mouseout();
return false;
}
}
Slider.prototype = {
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 : 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);
},
mouseout : function () {
this.over = false;
setOpacity(this.view.img, this.oP);
}
}
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_x('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);
this.obj.parent = this;
this.obj.onmouseover = function() {
this.parent.over();
return false;
}
}
Slide.prototype = {
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;
}
},
move : function() {
var that = this.parent;
var s = (this.x1 - this.x0) / that.S;
if (this.N && Math.abs(s) > .5) {
this.obj.style.left = Math.floor(this.x0 += s) + 'px';
}
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) {
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;
}
}
},
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);
}
}
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);
}
}
}();
完整代码下载
参考：中国站长站 素材
