怎样得到所选列表的“显示值”
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<select name="mz">
<option value="1">qaz</option>
<option value="2">wsx</option>
<option value="3">edc</option>
</select>
</body>
</html>
问题:怎样得到选中列表项的“显示值”,比如wsx?