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<ul><li>1</li>
<li><ul>
<li>11</li>
<li>12</li>
<li>13</li>
<li>14</li>
</ul>
</li>
<li>2</li>
<li><ul>
<li>21</li>
<li>22</li>
<li>23</li>
<li>24</li>
</ul>
</li>
<li>3</li>
<li><ul>
<li>31</li>
<li>32</li>
<li>33</li>
<li>34</li>
</ul>
</li>
</ul>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<script>
function expand(node){
var node=document.getElementById(node);
if(node.style.display=="block")
node.style.display="none";
else
node.style.display="block"
}
</script>
</HEAD>
<BODY>
<ul><li ondblclick ="expand('first')" style="display: block; cursor : hand; color: red;">1</li>
<li id="first"><ul>
<li>11</li>
<li>12</li>
<li>13</li>
<li>14</li>
</ul>
</li>
<li ondblclick ="expand('second')" style="display: block; cursor: hand; color: red;">2</li>
<li id="second"><ul>
<li>21</li>
<li>22</li>
<li>23</li>
<li>24</li>
</ul>
</li>
<li ondblclick ="expand('third')" style="display: block; cursor: hand; color: red;">3</li>
<li id="third"><ul>
<li>31</li>
<li>32</li>
<li>33</li>
<li>34</li>
</ul>
</li>
</ul>
</BODY>
</HTML>