高手帮我解决下这段css代码。半天不知道那里出错了。
程序代码：<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.>
<html xmlns="http://www.>
<html>
<head>
<title>11111</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<style type="text/css">
/*--全局样式样式--*/
body,ul,ol,li,h1,h2,h3,img,div{margin:0;padding:0;border:0;}
body { font-family:Arial, "宋体"; font-size:12px; background:#fff; color:#000;}
ul,ol {list-style-type: none;}
.L_folat{ float:left;}.R_float{ float:right; }
em{font-style:normal;}
/*--内容样式--*/
.container{width:958px; margin:100px auto 0;}
.bbsImg{ float:left; width:357px; background:#FF0; height:341px;}
#topForums{ float:right; width:594px;}
#topForums #ranking{ height:40px; position:relative;border:#9cc solid 1px;}
#topForums #ranking h3{ position:absolute;left:18px;top:10px; color:#1e50a2;}
#topForums #ranking ul{ position:absolute;top:8px;right:70px;}
#topForums #ranking ul li{ display:inline; color: #1e50a2; margin:20px; font-size:14px;}
#topForums #rankingInfo{ height:300px; border-right:1px solid #ccc; border-left:1px solid #ccc;border-bottom:1px solid #ccc; padding-top:3px;}
#topForums #rankingInfo #rankingText{ height:295px; padding:7px 5px 0 5px;}
#topForums #rankingInfo #rankingText ul{ width:272px;padding:5px 5px 5px 8px;}
#topForums #rankingInfo #rankingText ul li{ line-height:25px; height:27px; border-bottom:1px dotted #ccc;}
#topForums #rankingInfo #rankingText ul li em{ margin:0 5px 0 0;}
#topForums #rankingInfo #rankingText ul li em{ background:#60F; color:#fff; }
#topForums #rankingInfo #rankingText ul li span{ color:#F63;}
</style>
</head>
<body>
<div class="container">
<div class="bbsImg"></div>
<div id="topForums">
<!--论坛排行标题-->
<div id="ranking">
<h3>论坛排行</h3>
<ul>
<li>热帖排行</li>
<li>新帖排行</li>
</ul>
</div>
<div id="rankingInfo">
<div id="rankingText">
<ul class="L_folat">
<li><span class="R_float">千里走单</span><em>1</em>111</li>
<li><span class="R_float">xiaoshua</span><em>2</em>2222</li>
<li><span class="R_float">小福星</span><em>3</em>3333</li>
<li><span class="R_float">就当没来</span><em>4</em>111</li>
<li><span class="R_float">胖子仐</span><em>5</em>111</li>
<li><span class="R_float">雪豆儿</span><em>6</em>111</li>
<li><span class="R_float">梦醒时光</span><em>7</em>111</li>
<li><span class="R_float">蒙古小烧</span><em>8</em>111</li>
<li><span class="R_float">乐居网友</span><em>9</em>111</li>
<li><span class="R_float">佳佳沐</span><em>10</em>111</li>
</ul>
</div>
</div>
</div>
</body>
</html>