<div>里包含<p>标签疑问

<!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>
    <title>左中右版式</title>
    <style type="text/css">
        body
        {
            margin: 0px;
            padding: 0px;
            font-family: Arial;
            color: #060;
            background-color: #dddddd;
        }
        #banner
        {
            margin:0px;
        }
        #mainBox
        {
            margin:0px;
        }
        #left
        {
            position: relative;
            top: 0px;
            left: 0px;
            margin: 0px;
            background: #cce9ff;
            width: 190px; /* 固定宽度 */
        }
        #middle
        {
            padding: 10px;
            background: #ffffff;
            margin: 0px 190px 0px 190px; /* 左右空190px */
            margin-top: 0px;
        }
        #right
        {
            position: relative;
            top: 0px;
            right: 0px;
            margin: 0px;
            background: #cce9ff;
            width: 190px;
        }
        p
        {
            font-size: 12px;
            
            margin: 20px 0px 0px 20px;
            padding: 10px;
        }
        pre
        {
            font-size: 12px;
            line-height: 20px;
            margin: 20px 0px 10px 0px;
            font-family: arial;
        }
    </style>
</head>
<body>
    <div id="banner"><img src="banner1.jpg" alt="" />
    </div>
    <div id="mainBox">
        <div id="left">
            <p>
                left</p>
        </div>
        <div id="middle">
            <pre>
body{
    margin:0px; padding:0px;
    font-family:arial;
    color:#060;
    background-color:#CCC;
}
#left{
    position:absolute;
    top:0px;
    left:0px;
    margin:0px;
    background:#FFF;
    width:190px;/* 固定宽度 */
}
#middle{
    padding:10px;
    background:#FFF;
    margin:0px 190px 0px 190px;/* 左右空190px */
    margin-top:0px;
}
#right{
    position:absolute;
    top:0px;
    right:0px;
    margin:0px;
    background:#FFF;
    width:190px;/* 固定宽度 */
}
p{
    font-size:12px;
    line-height:22px;
    margin:20px 0px 10px 0px; 
    padding:10px;
}
pre{
    font-size:12px;
    line-height:20px;
    margin:20px 0px 10px 0px;
    font-family:arial;
}
</pre>
        </div>
        <div id="right">
            <p>
                right</p>
        </div>
    </div>
    <div id="footer">aappooiiuuyy</div>
</body>
</html>

p标签包含的范围

 

p标签的父标签<div id="left">包含的范围

 

为什么出现如上结果呢？

因为父标签没设置padding属性的原因。

而此问题在ie6不存在。


posted @ 2011-07-29 11:00  草珊瑚  阅读(2996)  评论(1)  编辑  收藏  举报