<style type="text/css">
<!--
/*** banner样式 ***/
#banner{width:475px; height:300px; float:left; display: inline; position:relative; }
#banner .Limg{position:relative;}
#banner .Limg li{position:absolute;top:0;left:0;background:#fff;}
#banner .Limg li p{line-height:25px; font-size:14px; padding-left:15px;}
#banner .Nubbt{position:absolute;z-index:9; bottom:10px;right:10px;}
#banner .Nubbt span{ float:right; color:#fff; padding:0px 5px; height:16px; line-height:16px; font-style:normal; margin-left:4px; border:#cecfd3 1px solid; background:#fff; color:#333; cursor:pointer; text-align:center;}
#banner .Nubbt span.on{ display:block; background:#9f0000; border:#880001 1px solid; color:#fff; }
-->
</style>
<div id="banner">
<ul class="Limg">
<li><a href="/"><img src="img/index1.jpg" width="475" height="300" alt="" /></a></li>
<li><a href="/"><img src="img/index3.jpg" width="475" height="300" alt="" /></a></li>
<li><a href="/"><img src="img/index5.jpg" width="475" height="300" alt="" /></a></li>
</ul>
<cite class="Nubbt"><span class="on">1</span><span>2</span><span>3</span></cite><br />
</div>
<script type="text/javascript">
//*焦点切换
(function () {
if (!Function.prototype.bind) {
Function.prototype.bind = function (obj) {
var owner = this, args = Array.prototype.slice.call(arguments), callobj = Array.prototype.shift.call(args);
return function (e) { e = e || top.window.event || window.event; owner.apply(callobj, args.concat([e])); };
};
}
})();
var player = function (id) {
this.ctn = document.getElementById(id);
this.adLis = null;
this.btns = null;
this.animStep = 0.2; //动画速度0.1～0.9
this.switchSpeed =5; //自动播放间隔(s)
this.defOpacity = 1;
this.tmpOpacity = 1;
this.crtIndex = 0;
this.crtLi = null;
this.adLength = 0;
this.timerAnim = null;
this.timerSwitch = null;
this.init();
};
player.prototype = {
fnAnim: function (toIndex) {
if (this.timerAnim) { window.clearTimeout(this.timerAnim); }
if (this.tmpOpacity <= 0) {
this.crtLi.style.opacity = this.tmpOpacity = this.defOpacity;
this.crtLi.style.filter = 'Alpha(Opacity=' + this.defOpacity * 100 + ')';
this.crtLi.style.zIndex = 0;
this.crtIndex = toIndex;
return;
}
this.crtLi.style.opacity = this.tmpOpacity = this.tmpOpacity - this.animStep;
this.crtLi.style.filter = 'Alpha(Opacity=' + this.tmpOpacity * 100 + ')';
this.timerAnim = window.setTimeout(this.fnAnim.bind(this, toIndex), 50);
},
fnNextIndex: function () {
return (this.crtIndex >= this.adLength - 1) ? 0 : this.crtIndex + 1;
},
fnSwitch: function (toIndex) {
if (this.crtIndex == toIndex) { return; }
this.crtLi = this.adLis[this.crtIndex];
for (var i = 0; i < this.adLength; i++) {
this.adLis[i].style.zIndex = 0;
}
this.crtLi.style.zIndex = 2;
this.adLis[toIndex].style.zIndex = 1;
for (var i = 0; i < this.adLength; i++) {
this.btns[i].className = '';
}
this.btns[toIndex].className = 'on'
this.fnAnim(toIndex);
},
fnAutoPlay: function () {
this.fnSwitch(this.fnNextIndex());
},
fnPlay: function () {
this.timerSwitch = window.setInterval(this.fnAutoPlay.bind(this), this.switchSpeed * 1000);
},
fnStopPlay: function () {
window.clearTimeout(this.timerSwitch);
},
init: function () {
this.adLis = this.ctn.getElementsByTagName('li');
this.btns = this.ctn.getElementsByTagName('cite')[0].getElementsByTagName('span');
this.adLength = this.adLis.length;
for (var i = 0, l = this.btns.length; i < l; i++) {
with ({ i: i }) {
this.btns[i].index = i;
this.btns[i]. = this.fnSwitch.bind(this, i);
this.btns[i]. = this.fnSwitch.bind(this, i);
}
}
this.adLis[this.crtIndex].style.zIndex = 2;
this.fnPlay();
this.ctn. = this.fnStopPlay.bind(this);
this.ctn. = this.fnPlay.bind(this);
}
};
var player1 = new player('banner');
</script>
