超出DIV部分自动显示滚动条的代码

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
    #aa {
    width:160px;
    height:100px;
    background:#ccc;
    /*word-break:break-all;*/
    word-wrap:break-word; 
   overflow:auto;/*自动出现滚动条*/
  /*超出div部份则自动隐藏*/
    /*overflow-x:hidden;*/
  /*div自动出现垂直滚动条*/
    /*overflow-y:auto;*/
}    
</style>
</head>
 
<body>
<div id="aa">qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq</div>
</body>
</html>

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