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检测flash 版本

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浮动布局所带来的影响以及如何清除浮动

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　　在页面的布局过程中浮动是个好东西，我们经常会用到浮动布局，它可以使元素共享一行，极大的方便了我们的布局过程。但是很多人可能只是会用，对浮动的原理只是一知半解，如果没有清晰的认识到浮动所带来的影响以及如何清除浮动所带来的影响，那么面对代码量庞大的页面将会变得一头雾水。所以接下来我们来深入学习一下浮动布局，相信大家把浮动这个概念掌握的很清晰的时候，以后运用起来将会更加得心应手。　　一. 什么是浮动布局？　　　CSS 的 Float（浮动），会使元素向左或向右移动，使元素共享一行，类似于给元素加了inline-block的作用。在w3c中这样描述浮动：浮动的框可以向左或向右移动，直到它的外边缘碰到包含框或另一个浮动框的边框为止。由于浮动框不在文档的普通流中，所以文档的普通流中的块框表现得就像浮动框不存在一样。接下来我们具体来看。　　二. 浮动带来的影响　　1. 脱离文档流，不占据页面空间　　我们知道，css的块级元素比如说div在页面中默认是独占一行并且自上而下排列，也就是我们所说的流，也就是我们通常所说的标准流，接下来我们来看以下的案例：　　html代码： <div class="div1">150 * 100</div> <div class="div2">100 * 150</div> <div class="div3">300 * 200</div> 　

Conditionally style an element based on whether it contains a particular child element?

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问题 This is in reference to a nav menu on a site I am working on: I have applied a hover style to these particular anchors (subnav buttons): ul#css3menu ul li:hover>a { Now I want to further style any of these anchors that have a child span element. How could I code that? I have it somewhat working by applying the style to the span element: ul#css3menu ul span:hover{ The problem with this is the style is only applied when hovering over the span element's space rather than while hovering over the

横向导航二级菜单

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横向导航二级 <!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> <script type="text/javascript" src="jquery-1.1.3.pack.js"></script> <style> *{ margin:0px; padding:0px; list-style:none; } body{ font-size:12px; } .nav{ float:left; clear:both; margin:100px; display:inline; } .nav li{ float:left; position:relative; } .nav li a{ display:block; width:60px; padding:8px 0px 6px; text-align:center;

jquery Current Nav item selector

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问题 I can't figure out how to use jQuery to style the current nav item. I've tried several tutorials and such to no avail. Any help would be appreciated. Thanks in advance. <div id="menu"> <ul id="nav"> <li><a href="http://poolguys.jaredmc.com/index.php">Contact</a></li> <li><a href="http://poolguys.jaredmc.com/index.php">Gallery</a></li> <li><a href="http://poolguys.jaredmc.com/pool_liners.php">Pool Liners</a></li> <li><a href="http://poolguys.jaredmc.com/services.php">Services</a></li> <li><a

Bootstap:span class icon bar not working

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问题 I have used span class icon bar to display that three lines symbol after resizing the windows and other components should get displayed under that icon. But when I resize the window it only shows that icon and after clicking on it nothing happens This what I have done : what's gone wrong? Thank you in advance <body> <nav class="navbar navbar-inverse"> <div class="container-fluid"> <! Header --> <div class="navbar-header"> <button type="button" class="navbar-toggle" data-toggle="collapse" data

Links inside HTML5 footer element (nav and aside?)

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问题 I'm currently moving a page from HTML4 to HTML5, and I have kind of an issue. There's a bunch of lists with links inside the footer. Most of them link to information (faq etc.) about the site itself. So I think it's OK to put those inside a nav element (see "Introducing HTML5" and the HTHML5 Doctor). But two lists contain links to external pages like Facebook. Now I could wrap those inside an aside, but this is a bit of an edge case: "It is legitimate to wrap the links to other pages on the

left, right & centering content inside a bootstrap navbar

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问题 trying to get a bootstrap navbar to have links on the left, center and right side on a responsive website. is this even possible? maybe navbar-justified is wrong to center content on the navbar? <nav class="navbar navbar-default navbar-fixed-top"> <div class="container-fluid"> <div class="navbar-header"> <ul class="nav navbar-nav navbar-left"> <a class="navbar-brand" href="#home"> LEFT </a> </ul> <ul class="nav navbar-nav navbar-justified"> <a href="#"> CENTER </a> </ul> <ul class="nav navbar

Wordpress: Adding a variable inside wp_nav_menu

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问题 I am trying to add a variable inside wp_nav_menu, I am not sure how to do it, please help me! Here is a snippet of the code: wp_nav_menu(array( 'menu' => 'Main Menu', 'theme_location' => 'Main Menu', 'container' => null, 'container_class' => '', 'menu_id' => 'header-menu', 'menu_class' => '', 'before' => '<span class="text1">', 'after' => '</span><span class="text2"><a href="">' . the_title($post->ID) . '</a></span>', )); PLEASE HELP ME! 回答1: Have a look at this tutorial. It's quite likely to

Center menu navigation [closed]

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问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 5 years ago . I have figured out how to center the logo, but cannot get the navigation to center as well. Hopefully you guys can help! Code for centering logo: #header #logo{ float: none !important; } #header hgroup { float: none !important; text-align: center !important; } I know this is pretty basic, but I