1.写
<!DOCTYPE html>
<html>
<head>
<title></title>
<script language="javascript" src="jquery.min.js"></script>
</head>
<body>
<select name="Usex" id="#Usex">
<option value="1">男</option>
<option value="2">女</option>
</select>
</body>
</html>
2.获取值
<script type="text/javascript"> $value=("select[name='Usex']").val(); </script>
3.回显
<select name="Usex" id="#Usex"> <option value="1" <{if $data.Usex=1 }> checked <{/if}> >男</option> <option value="2" <{if $data.Usex=2 }> checked <{/if}> >女</option> </select>