


CSS Web Page Layout Introduction Tutorial 12: Vertical Navigation Menu_Basic Tutorial
Vertical navigation menu is also an important form in website applications. The so-called vertical navigation menu refers to a form of navigation arranged from top to bottom placed on the left or right side of the web page. Let’s take a look at the effect first!

如图所示的效果,我们先看一下代码结构:
从以上可以看出,这次的XHTML部分的代码横向代码略有不同,我们没有继续使用ul和li标签,其实继续使用ul元素也能完好的实现纵向导航系统,但是在这风景点我们希望更多的提供不同途径来展现css而已设计的灵活与方便性以便于抛砖引玉,开拓更多的设计思想。
这一次采用的是div+h1+h2的形式。我们使用div标签设定了一个导航的结构区域。在这个区域中我们使用了h1来作二级分类的标题,h2来做二级分类下面的细节内容。在XHTML的讲法意义中,h1,h2,h3这些标签本身就具有用于对文本进行层级划分的意义,直接使用h1,h2来表示层级关系,相对于在标签中加入id或class来做层级的标记更为简单和直观,在这里使用h1,h2来标记不同级别的分类名称也实在是再合适不过了。我们来看一看css代码的设计:
#nav { width:100px; border-color:#c5c6c4; border-style:solid; border-width:0px 1px 1px 1px;}
#nav h1 { margin:0px; padding:4px; font-size:12px; font-weight:bold; font-family:Verdana; border-top:1px solid #c5c6c4; background-color:#CCCCCC;}
#nav h2 { margin:0px; padding:4px; font-size:12px; font-family:Verdana; font-weight:normal;}
#nav h2 a { color:#666666; text-decoration:none;}
#nav h2 a:hover { color:#999999; text-decoration:underline;}
本css代码部分采用了简化写法,如果哪句意思看不懂,您可以在Dreamweaver中打开选择编辑样式表即可查看具体是哪一项了,相信经过这样几次练习,这些代码您已经能完全看懂了,说明您离高手又近了一步了。
大家可能已经注意到了,#nav的边框本例中只设置了左右下和一像素,而没有上,而在h1的样式里设置了上部的上像素?这是为什么呢?因为h1的样式上部都有一条横线,如果nav上部再有一条横线的话成长两条了,结果显示出来就是两像素的高度了。
好了,完整的效果可以预览一下:
[Ctrl A Select all Note:If you need to introduce external Js, you need to refresh it to execute]

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