Web Front-endHTML TutorialNewbie, haven't started yet, please give me some advice_html/css_WEB-ITnoseNewbie, haven't started yet, please give me some advice_html/css_WEB-ITnose
这个怎么实现居中
html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
回复讨论(解决方案)
float元素不处理是不能居中的，需要特别的处理：
demo here
<!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"/> <title>无标题文档</title> <style type="text/css"> #most{width:780px;height:30px;background:#f0f0f0;float:left;border:1px solid #ccc; position:relative; left:50%; margin-left:-390px;} #most ul{padding:0px;list-style:none;float:left;width:8000px;margin:0px auto} #most li{float:left} #main{float:left} #most a{display:block;width:119px;height:30px;color:#333;text-align:center;line-height:29px;text-decoration:none;font-size:14px;font-weight:bold} #most a:hover{background-color:#FFF;color:#333} </style></head><body><div id="most"> <div id="main"> <ul> <li><a href="#">电子配件</a></li> <li><a href="#">电脑整机</a></li> <li><a href="#">需要订购</a></li> <li><a href="#">联系我们</a></li> </ul> </div></div></body></html> 这是你原来基础上做的扩展，这种方式只是救急，如果页面元素过多就会引发其它问题。所以我建议用下面的方式居中。
margin:0 auto; 这是大部分网站采取居中的一种办法，高效，安全，稳定，有力。
然后float之后的元素会影响其它兄弟元素，所以要clearfix。
demo here.
<!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"/> <title>无标题文档</title> <style type="text/css"> #most{width:780px;height:30px;background:#f0f0f0;margin: 0 auto;border:1px solid #ccc;} #most ul{padding:0px;list-style:none;float:left;width:8000px;margin:0px auto} #most li{float:left} /*#main{float:left}*/ #most a{display:block;width:119px;height:30px;color:#333;text-align:center;line-height:29px;text-decoration:none;font-size:14px;font-weight:bold} #most a:hover{background-color:#FFF;color:#333} .clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;} .clearfix{display:inline-block;} .clearfix{display:block;} </style></head><body><div id="most"> <div id="main"> <ul class="clearfix"> <li><a href="#">电子配件</a></li> <li><a href="#">电脑整机</a></li> <li><a href="#">需要订购</a></li> <li><a href="#">联系我们</a></li> </ul> </div></div></body></html> 常用居中margin:0 auto;
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