使用css3仿造window7的开始菜单
相当逼真，css3果然强悍。
友情提示：请勿在IE下浏览。
查看实例：http://www.jankoatwarpspeed.com/examples/windows7menu/
点击下载：http://www.36ria.com/wp-content/plugins/download-monitor/download.php?id=170
来看下原作者的设计草图：
简明创建过程
第一步 ：创建如下菜单结构
<div id="startmenu">
<ul id="programs">
<li><a href="#"><img src="firefox-32.png" alt="" />Mozilla Firefox</a></li>
<li><a href="#"><img src="chrome.png" alt="" />Google Chrome</a></li>
<li><a href="#"><img src="safari.png" alt="" />Safari</a></li>
<li><a href="#"><img src="opera.png" alt="" />Opera</a></li>
<li><a href="#"><img src="ie.png" alt="" />Internet Explorer</a></li>
<li><a href="#"><img src="rss_32.png" alt="" />RSS Feeds</a></li>
<li><a href="#"><img src="twitter_32.png" alt="" />Twitter</a></li>
<li><a href="#"><img src="delicious_32.png" alt="" />Delicious</a></li>
</ul>
<ul id="links">
<li class="icon"><img src="folder.png" alt="" /></li>
<li><a href="#"><span>Documents</span></a></li>
<li><a href="#"><span>Pictures</span></a></li>
<li><a href="#"><span>Music</span></a></li>
<li><a href="#"><span>Computer</span></a></li>
<li><a href="#"><span>Network</span></a></li>
<li><a href="#"><span>Connect to</span></a></li>
</ul>
</div>
<ul id="programs">
<li><a href="#"><img src="firefox-32.png" alt="" />Mozilla Firefox</a></li>
<li><a href="#"><img src="chrome.png" alt="" />Google Chrome</a></li>
<li><a href="#"><img src="safari.png" alt="" />Safari</a></li>
<li><a href="#"><img src="opera.png" alt="" />Opera</a></li>
<li><a href="#"><img src="ie.png" alt="" />Internet Explorer</a></li>
<li><a href="#"><img src="rss_32.png" alt="" />RSS Feeds</a></li>
<li><a href="#"><img src="twitter_32.png" alt="" />Twitter</a></li>
<li><a href="#"><img src="delicious_32.png" alt="" />Delicious</a></li>
</ul>
<ul id="links">
<li class="icon"><img src="folder.png" alt="" /></li>
<li><a href="#"><span>Documents</span></a></li>
<li><a href="#"><span>Pictures</span></a></li>
<li><a href="#"><span>Music</span></a></li>
<li><a href="#"><span>Computer</span></a></li>
<li><a href="#"><span>Network</span></a></li>
<li><a href="#"><span>Connect to</span></a></li>
</ul>
</div>
win7的开始菜单有二个部分，左侧程序菜单，右侧系统菜单。
第二步：菜单容器css
#startmenu { border:solid 1px #102a3e; overflow:visible; display:inline-block; margin:60px 0 0 20px;
-moz-border-radius:5px;-webkit-border-radius:5px; position:relative;
box-shadow: inset 0 0 1px #fff; -moz-box-shadow: inset 0 0 1px #fff; -webkit-box-shadow: inset 0 0 1px #fff;
background-color:#619bb9;
background: -moz-linear-gradient(top, rgba(50, 123, 165, 0.75), rgba(46, 75, 90, 0.75) 50%, rgba(92, 176, 220, 0.75));
background: -webkit-gradient(linear, center top, center bottom, from(#327aa4),color-stop(45%, #2e4b5a), to(#5cb0dc)); }
-moz-border-radius:5px;-webkit-border-radius:5px; position:relative;
box-shadow: inset 0 0 1px #fff; -moz-box-shadow: inset 0 0 1px #fff; -webkit-box-shadow: inset 0 0 1px #fff;
background-color:#619bb9;
background: -moz-linear-gradient(top, rgba(50, 123, 165, 0.75), rgba(46, 75, 90, 0.75) 50%, rgba(92, 176, 220, 0.75));
background: -webkit-gradient(linear, center top, center bottom, from(#327aa4),color-stop(45%, #2e4b5a), to(#5cb0dc)); }
有几个关注的点,可以留意下：
- -moz-border-radius:5px;-webkit-border-radius:5px;圆角效果，这是css3中应用最广的
- box-shadow: inset 0 0 1px #fff; -moz-box-shadow: inset 0 0 1px #fff; -webkit-box-shadow: inset 0 0 1px #fff;阴影效果
- background: -moz-linear-gradient(top, rgba(50, 123, 165, 0.75), rgba(46, 75, 90, 0.75) 50%, rgba(92, 176, 220, 0.75));渐变背景
第三步：菜单左侧部分的css
#programs { background:#fff; border:solid 1px #365167; margin:7px 0 7px 7px;
box-shadow: 0 0 1px #fff; -moz-box-shadow: 0 0 1px #fff; -webkit-box-shadow: 0 0 1px #fff;
-moz-border-radius:3px;-webkit-border-radius:3px;}
#programs a { border:solid 1px transparent; display:block; padding:3px; margin:3px;
color:#4b4b4b; text-decoration:none; min-width:220px;}
#programs a:hover {border:solid 1px #7da2ce;
-moz-border-radius:3px; -webkit-border-radius:3px;
box-shadow: inset 0 0 1px #fff; -moz-box-shadow: inset 0 0 1px #fff; -webkit-box-shadow: inset 0 0 1px #fff;
background-color:#cfe3fd;
background: -moz-linear-gradient(top, #dcebfd, #c2dcfd);
background: -webkit-gradient(linear, center top, center bottom, from(#dcebfd), to(#c2dcfd));}
#programs a img {border:0; vertical-align:middle; margin:0 5px 0 0;}
box-shadow: 0 0 1px #fff; -moz-box-shadow: 0 0 1px #fff; -webkit-box-shadow: 0 0 1px #fff;
-moz-border-radius:3px;-webkit-border-radius:3px;}
#programs a { border:solid 1px transparent; display:block; padding:3px; margin:3px;
color:#4b4b4b; text-decoration:none; min-width:220px;}
#programs a:hover {border:solid 1px #7da2ce;
-moz-border-radius:3px; -webkit-border-radius:3px;
box-shadow: inset 0 0 1px #fff; -moz-box-shadow: inset 0 0 1px #fff; -webkit-box-shadow: inset 0 0 1px #fff;
background-color:#cfe3fd;
background: -moz-linear-gradient(top, #dcebfd, #c2dcfd);
background: -webkit-gradient(linear, center top, center bottom, from(#dcebfd), to(#c2dcfd));}
#programs a img {border:0; vertical-align:middle; margin:0 5px 0 0;}
这里值得留意的是鼠标经过菜单项的效果设置，也就是#programs a:hover里的样式，这是难点，也是css3的强大之处，依旧是圆角、阴影、渐变背景。
第四步：菜单右侧的CSS部分
#links {margin:7px; margin-top:-30px;}
#links li.icon {text-align:center;}
#links a {border:solid 1px transparent; display:block; margin:5px 0; position:relative;
color:#fff; text-decoration:none; min-width:120px;}
#links a:hover {border:solid 1px #000;
-moz-border-radius:3px; -webkit-border-radius:3px;
box-shadow: 0 0 1px #fff; -moz-box-shadow: inset 0 0 1px #fff; -webkit-box-shadow: inset 0 0 1px #fff;
background-color:#658da0;
background: -moz-linear-gradient(center left, rgba(81,115,132,0.55), rgba(121,163,184,0.55) 50%, rgba(81,115,132,0.55));
background: -webkit-gradient(linear, 0% 100%, 100% 100%, from(#517384), color-stop(50%, #79a3b8), to(#517384));
}
#links a span { padding:5px; display:block; }
#links a:hover span { background: -moz-linear-gradient(center top, transparent, transparent 49%, rgba(2,37,58,0.5) 50%, rgba(63,111,135,0.5));
background: -webkit-gradient(linear, center top, center bottom, from(transparent), color-stop(49%, transparent),
color-stop(50%, rgba(2,37,58,0.5)), to(rgba(63,111,135,0.5))); }
#links li.icon {text-align:center;}
#links a {border:solid 1px transparent; display:block; margin:5px 0; position:relative;
color:#fff; text-decoration:none; min-width:120px;}
#links a:hover {border:solid 1px #000;
-moz-border-radius:3px; -webkit-border-radius:3px;
box-shadow: 0 0 1px #fff; -moz-box-shadow: inset 0 0 1px #fff; -webkit-box-shadow: inset 0 0 1px #fff;
background-color:#658da0;
background: -moz-linear-gradient(center left, rgba(81,115,132,0.55), rgba(121,163,184,0.55) 50%, rgba(81,115,132,0.55));
background: -webkit-gradient(linear, 0% 100%, 100% 100%, from(#517384), color-stop(50%, #79a3b8), to(#517384));
}
#links a span { padding:5px; display:block; }
#links a:hover span { background: -moz-linear-gradient(center top, transparent, transparent 49%, rgba(2,37,58,0.5) 50%, rgba(63,111,135,0.5));
background: -webkit-gradient(linear, center top, center bottom, from(transparent), color-stop(49%, transparent),
color-stop(50%, rgba(2,37,58,0.5)), to(rgba(63,111,135,0.5))); }
要留意的点依旧是哪几项，难点在于细节的微调，尤其是渐变背景的制作，css3中非常灵活，下次有机会，发篇css3渐变背景的详细教程。
英文原文：http://www.jankoatwarpspeed.com/post/2010/04/06/windows-7-start-menu-css3.aspx
原文链接：http://www.36ria.com/2368
