表格就是表格该怎么用就怎么用，就算标准的描述也是“应该避免用表格来布局” 而不是“必须避免用表格来布局” 所以有些不是CSS做的事，该怎样就怎样不用纠结。
我把你那个重写了一下：<html>
<head>
<meta http-equiv="content-type" content="text/htmlcharset=utf-8" />
<title>form</title>
<style>
body { padding:0font-size:14pxmargin:50pxcolor:#000font-family:Arial,verdana,helvetica,sans-serif}
fieldset{ margin:0padding:0padding-bottom:20pxwidth:584pxbackground-color:#cccline-height:30pxheight:auto}
legend{ padding:0.2emmargin:0font-size:2emcolor:#fffwhite-space:preletter-spacing:-1pxtext-align:centerbackground-color:#ccc}
body,div,ul,li,label{margin:0padding:0}
body,div,fieldset{ margin:0 autotext-align:centeroverflow:auto}
#main{ float:left}
ul{ text-align:leftheight:100pxwidth:280pxoverflow:hidden}
#main li{ float:leftheight:33pxwidth:280px overflow:auto}
#main li label,#feedback label{ float:leftwidth:80pxtext-align:rightfont-size:14pxline-height:30px}
#main li input{ float:leftheight:32pxwidth:160pxline-height:28px}
#right{ float:leftfont-size:14px_margin-top:6px}
#right li{ width:300pxheight:33px}
#feedback{ clear:bothfloat:left}
textarea{ float:leftwidth:430pxclear:right}
.submit{ float:leftclear:bothwidth:580px}
#submit{ clear:bothmargin-top:10pxwidth:100pxheight:30px}
a{ margin-left:16px}
</style>
</head>
<body>
<form id="fileset" action="default.asp" method="post" class="form">
<fieldset>
<legend>提交表单</legend>
<div id="main">
<ul id="">
<li>
<label for="name">姓名:</label>
<input type="text" id="name" />
</li>
<li><label for="email">email:</label><input type="text" id="email" /></li>
<li><label for="address">网址:</label><input type="text" id="address" value="http://" /></li>
</ul>
</div>
<div id="right">
<ul id="">
<li><label>性别:</label>
<input type="radio" name="radio" id="male" /><label for="male">男</label>
<input type="radio" name="radio" id="female" /><label for="female">女</label>
</li>
<li><label>生日:</label>
<select id="year" size="1">
<option value="1">1990
<option value="2">2000
</select>
<label for="year">年</label>
<select id="month" size="1">
<option value="1">1
<option value="2">2
</select>
<label for="month">月</label>
<select id="day" size="1">
<option value="1">1
<option value="2">2
</select>
<label for="day">日</label>
</li>
<li><label>爱好:</label>
<input type="checkbox" id="basketball" /><label for="basketball">篮球</label>
<input type="checkbox" id="football" /><label for="football">足球</label>
</li>
</ul>
</div>
<div id="feedback">
<label>反馈:</label>
<textarea id="back" rows="8" cols="2" wrap="soft"></textarea>
</div>
<div class="submit">
<input type="submit" value="提 交" id="submit" /><a href="#" >取消</a>
</div>
</form>
</fieldset>
</body>
</html>
你运行一下看看
