使用jquery实现select添加实现后台权限添加的效果-jquery

<form name="form1" method="post" action="">
<select id="select1" size="5" multiple style="width:100px " >
<option value="111">北京</option>
<option value="222">上海</option>
<option value="333">广州</option>
<option value="333">山东</option>
<option value="333">常州</option>
</select><br/><br/>
<input type="button" id="button1" value="添加">
<input type="button" id="button2" value="删除"><br/><br/>
<select id="select2" size="5" multiple style="width:100px " >

</select>
</form>

<script src="js/jquery-1.6.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("#select1").dblclick(function () { $("#select1 :selected").appendTo($("#select2")); });
$("#select2").dblclick(function () { $("#select2 :selected").appendTo($("#select1")); });
$("#button1").click(function () { $("#select1 option:selected").appendTo($("#select2")); });
$("#button2").click(function () { $("#select2 option:selected").appendTo($("#select1")); });
})
</script>