求个Jquery给树节点添加click事件

上代码<script type="text/javascript">          $(document).ready(function(){   
              $.ajax({
                  url: 'ajax.xml',
                  type: 'GET',
                  dataType: 'xml',
                  timeout: 1000,
                  cache: false,
                  error: function (xml) {
                      alert('加载XML文档出错');
                  },
                  success: function (xml) {                      //建立一个代码片段
                      var frag = $("<ul/>");                      //遍历所有student节点
                      $(xml).find("student").each(function (i) {
                          //获取id节点
                          var id = $(this).children("id"),
                          //获取节点文本
                          id_value = id.text(),
                          //获取student下的email属性。
                          email = $(this).attr("email");                          //构造HTML字符串，通过append方法添加进之前建立代码片段
                          frag.append("<li>" + id_value + "-" + email + "</li>");
                      });                      //最后得到的frag添加进HTML文档中
                      frag.appendTo("#load");
                  }
              });          });  </script>XML:<?xml version="1.0" encoding="UTF-8"?>
<stulist>
  <student email="[email protected]">
    <name>zhangsan</name>
    <id>1</id>
  </student>
  <student email="[email protected]">
    <name>lisi</name>
    <id>2</id>
  </student>
</stulist>现在树可以简单生成了，我想问的是 怎么用 jquery 给 每个树的子节点动态的添加click事件 以便能在右边显示对应的内容？