JS实现一个列表中包含上移下移删除等功能

<ul class="clearfix">
<li class="courseList">
<div class="titDefault clearfix">
<div class="left clearfix">
<span class="dragBtn"></span><span class="tit">内容<em class="contIndex">1</em>：</span><em title="2013年 加班.txt" class="titDefaultName">2013年 加班.txt</em>
</div>
<div class="mid">2014/9/24 9:54:00</div>
<div class="right clearfix">
<a value="253040" class="moveUpBtn" href="javascript:;"><span class="delTit">上移</span></a>
<a value="253040" class="moveDownBtn" href="javascript:;"><span class="delTit">下移</span></a>
<a value="253040" class="deleteBtn" href="javascript:;"><span class="delTit">删除</span></a>
</div>
</div>
</li>
<li class="courseList">
<div class="titDefault clearfix">
<div class="left clearfix">
<span class="dragBtn"></span><span class="tit">内容<em class="contIndex">2</em>：</span><em title="使用说明.txt" class="titDefaultName">使用说明.txt</em>
</div>
<div class="mid">2014/9/24 9:54:00</div>
<div class="right clearfix">

<a value="253041" class="moveUpBtn" href="javascript:;"><span class="delTit">上移</span></a>
<a value="253041" class="moveDownBtn" href="javascript:;"><span class="delTit">下移</span></a>
<a value="253041" class="deleteBtn" href="javascript:;"><span class="delTit">删除</span></a>
</div>
</div>
</li>
<li class="courseList">
<div class="titDefault clearfix">
<div class="left clearfix">
<span class="dragBtn"></span><span class="tit">内容<em class="contIndex">3</em>：</span><em title="占占大师.txt" class="titDefaultName">占占大师.txt</em>
</div>
<div class="mid">2014/9/24 9:54:00</div>
<div class="right clearfix">
<a value="253040" class="moveUpBtn" href="javascript:;"><span class="delTit">上移</span></a>
<a value="253040" class="moveDownBtn" href="javascript:;"><span class="delTit">下移</span></a>
<a value="253040" class="deleteBtn" href="javascript:;"><span class="delTit">删除</span></a>
</div>
</div>
</li>
<li class="courseList">
<div class="titDefault clearfix">
<div class="left clearfix">
<span class="dragBtn"></span><span class="tit">内容<em class="contIndex">4</em>：</span><em title="排序问题.txt" class="titDefaultName">排序问题.txt</em>
</div>
<div class="mid">2014/9/24 9:54:00</div>
<div class="right clearfix">

<a value="253041" class="moveUpBtn" href="javascript:;"><span class="delTit">上移</span></a>
<a value="253041" class="moveDownBtn" href="javascript:;"><span class="delTit">下移</span></a>
<a value="253041" class="deleteBtn" href="javascript:;"><span class="delTit">删除</span></a>
</div>
</div>
</li>
</ul>

<script type="text/ecmascript">
$(function () {
//上移
$(".clearfix").on("click", ".moveUpBtn", function () {
var self = $(this);
var _old = self.closest("li.courseList");
var _new = self.closest("li.courseList").prev("li");
if (_new.length > 0) {
var _temp = _old.html();
_old.empty().append(_new.html());
_new.empty().append(_temp);
}

});

//下移
$(".clearfix").on("click", ".moveDownBtn", function () {
var self = $(this);
var _old = self.closest("li.courseList");
var _new = self.closest("li.courseList").next("li");
if (_new.length > 0) {
var _temp = _old.html();
_old.empty().append(_new.html());
_new.empty().append(_temp);
}
});

//删除
$(".clearfix").on("click", ".deleteBtn", function () {
var self = $(this);//当前click事件源对象
self.closest("li.courseList").remove();
});

});
</script>