jquery获取当前元素索引值用法实例

<div id="carousel"> 
  <div id="carouselimg"> 
 <div id="imgcontainer"> 
   <a href="#" mce_href="#"><img src="" /></a> 
   <a href="#" mce_href="#"><img src="" /></a> 
   <a href="#" mce_href="#"><img src="" /></a> 
   <a href="#" mce_href="#"><img src="" /></a> 
   <a href="#" mce_href="#"><img src="" /></a> 
 </div> 
  </div> 
  <div id="carouseltitle"> 
 <div class="carouseltext"> 
   <span> </span> 
   <span> </span> 
   <span> </span> 
   <span> </span> 
   <span> </span> 
 </div> 
 <ul> 
   <li><span>1</span></li> 
   <li><span>2</span></li> 
   <li><span>3</span></li> 
   <li><span>4</span></li> 
   <li><span>5</span></li> 
 </ul> 
  </div> 
</div>

<SCRIPT src="http://ajax.googleapis./ajax/libs/jquery/1.4.2/jquery.min.js" mce_src="http://ajax.googleapis./ajax/libs/jquery/1.4.2/jquery.min.js"></SCRIPT> 
<SCRIPT type=text/javascript>  
var carousedata = [ 
  {index:0,link:"http://.dangdang.",imgsrc:"1.jpg",text:"数千款名品手机6折起"}, 
  {index:1,link:"http://.baidu.",imgsrc:"2.jpg",text:"测试文本2"}, 
  {index:2,link:"http://.google.",imgsrc:"3.jpg",text:"测试文本3"}, 
  {index:3,link:"http://.soso.",imgsrc:"xf.jpg",text:"测试文本4"}, 
  {index:4,link:"https://.jb51.",imgsrc:"py.jpg",text:"测试文本5"} 
]; 
$(document).ready(function(){ 
  $("#imgcontainer a").each(function(i){ 
 $(this).attr("href",carousedata[i].link); 
 $(this).children("img").attr("src",carousedata[i].imgsrc); 
  }); 
  $(".carouseltext span").each(function(i){ 
 $(this).text(carousedata[i].text); 
  }) 
  setInterval(function(){ 
 var li_index = $("#carouseltitle ul li").index($("#carouseltitle ul li.active")[0]); 
 $(".carouseltext span").hide(); 
 $(".carouseltext span").eq(li_index).show(); 
  },10); 
}); 
</script>