jquery带位置图标按钮焦点图jquery带位置图标按钮焦点图是一款来自IDC网站通栏带位置图标按钮切换焦点图代码。jQuery宽屏图片切换索引按钮 所属专题：焦点图代码
<script type="text/javascript">
(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 banner_tabs = 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 = 6;//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();
};
banner_tabs.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 = 'cur'
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].onclick = this.fnSwitch.bind(this,i);
this.btns[i].onclick = this.fnSwitch.bind(this,i);
}
}
this.adLis[this.crtIndex].style.zIndex = 2;
this.fnPlay();
this.ctn.onmouseover = this.fnStopPlay.bind(this);
this.ctn.onmouseout = this.fnPlay.bind(this);
}
};
var player1 = new banner_tabs('banner_tabs');
</script>