jquery ui tree怎么动态添加子菜单

var node = $('#tt').tree('getSelected')

if (node){

var nodes = [{

"id":13,

"text":"Raspberry"

},{

"id":14,

"text":"Cantaloupe"

}]

$('#tt').tree('append', {

parent:node.target,

data:nodes

})

}

<script type="text/javascript">

function getChildren(){

var node = $('#tt1').tree('getSelected') //tt1是你的树的id

if (node){

alert(“有子节点")

} else {

alert("无子节点")

}

}

</script>

<ul id="tt1" class="easyui-tree" animate="true" dnd="false">

<li>

<span>Folder</span>

<ul>

<li state="closed">

<span>Sub Folder 1</span>

<ul>

<li>

<span><a href="">File 11</a></span>

</li>

<li>

<span>File 12</span>

</li>

<li>

<span>File 13</span>

</li>

</ul>

</li>

<li>

<span>File 2</span>

</li>

<li>

<span>File 3</span>

</li>

<li>File 4</li>

<li>File 5</li>

</ul>

</li>

<li>

<span>File21</span>

</li>

</ul>

<a href="#" onclick="getChildren1()">getChildren1</a>

<button id="add">添加</button>

<div id="box"></div>

<script>

$(function(){

   $("#add").on("click",function(){

      $("#box").append("<div><span>"+($("#box div").size()+1)+"</span><button>删除</button></div>")

   })

   $("#box").on("click","div button",function(){

      $(this).parent().remove()

      $("#box div span").each(function(i,e){

         $(e).text(i+1)

      })

   })

})

</script>

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