问下如何让两个浮动元素行高自动相等？_html/css

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问下如何让两个浮动元素行高自动相等？_html/css_WEB-ITnose

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Jun 24, 2016 pm 12:11 PM

<!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=utf-8" /><link href="main_style.css" rel="stylesheet" rev="stylesheet" type="text/css" media="all" /><link href="menu.css" rel="stylesheet" rev="stylesheet" type="text/css" media="all" /><title>无标题文档</title></head><body> <div id="mainbox"> 		<div id="header"><h1 id="W-School-com-cn">W3School.com.cn</h1></div>       	      <div id="sidebar">     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     <p>"Never increase, beyond what is necessary, the number of entities required to explain anything." William of Ockham (1285-1349)</p>     </div>      <div id="content"><h2 id="Free-nbsp-Web-nbsp-Building-nbsp-Tutorials">Free Web Building Tutorials</h2>						<p>W3School.com.cn - The Largest Web Developers Site On The Net!</p>            <p>W3School.com.cn - The Largest Web Developers Site On The Net!</p>            <p>W3School.com.cn - The Largest Web Developers Site On The Net!</p>            <p>W3School.com.cn - The Largest Web Developers Site On The Net!</p>            <p>W3School.com.cn - The Largest Web Developers Site On The Net!</p>            <p>W3School.com.cn - The Largest Web Developers Site On The Net!</p>            <p>W3School.com.cn - The Largest Web Developers Site On The Net!</p>      </div>       <div id="footer">Copyright 2008 by YingKe Investment. </div>      </div> </body></html>

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@charset "utf-8";/* CSS Document */#header{ padding:0.5em;color:white;background-color:gray;clear:both;}#mainbox {     width:1250px;	margin:0 auto;	border:5px;		border:1px solid black;} #sidebar {        float:left;	padding:auto;	width:445px;	background:#F0F;	height:170%;			 }  #content {     FLOAT: left;	width:650px;		PADDING:auto;	background:#499;	height:170%;    }#footer{    padding:2.5em;color:white;background-color:gray;clear:both; text-align:center;}

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[img=http://my.csdn.net/my/album/detail/1163464][/img]
如图，粉红色与绿色的行高对不齐，请问如何才能自动对齐呢？

[img=http://my.csdn.net/my/album/detail/1163464#][/img]

楼主参考下

http://www.blueidea.com/tech/web/2006/3210.asp

自己慢慢设置，设一个值调了看看、、不等在重新设

#sidebar { float:left; padding:auto; width:445px; background:#F0F; height:540px; overflow:hidden; }

#content { FLOAT: left; width:650px; PADDING:auto; background:#499; height:540px;overflow:hidden; }

改成这样试试一下，因为都是内部的DIV，不属于浮动层，DIV会随着数据的增加变高，很明显，你左右2部分的P标签不一样多，建议设置成固定值，然后overflow:hidden;这样垂直方向就不会被挤开。

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