How to use div css to layout the page-turn_html/css_WEB-ITnose
如今web2.0炒的很厉害,先不去管它web2.0究竟是什么东西,反正div+css好像是火的不行了.各大知名站点都赶时髦似的把原来的表格布局翻新成了div+css,并美其名曰"本站符合w3c标准",以便让别人觉得他们的网站用的是最先进的技术.div布局真有那么先进么?这个问题仍在争论之中.在这里咱们不参与这种无聊的争论,学会它自己感觉一下不就清楚了么?
实际上div布局并不是什么高深的东西,如果你知道一点css就变得更简单了.首先我要说明几点:
1.这里的div并不是我们所说的层,虽然他们的标签都是
解成一个容器,它可以放文字,图片,表格等等.
2.用div布局必须对页面的结构进行准确的分析,当然用table也要分析页面结构.用div要分清上下,左右,实际上div布局也只有上下,左右.分析结构要先整体再部分,先分析整体的页面布局,例如我们一般的页面是上(banner和导航),中(页面主体内容,新闻等等),下(版权信息块)结构.
+------------------------------------+
| |
| header |
| |
|------------------------------------|
| |
| |
| midbody |
| |
| |
| |
| |
| |
|------------------------------------|
| |
| foot |
| |
+------------------------------------+
于是我们可以把整个页面放在一个大div内,于是我们可以这样来写
解释下上面的id是什么东西,id后面的内容是当前div以及div内部的东西用的css,这个css可
以规定div的宽度,大小,位置以及内部文字的大小、样式、颜色等等。
下面看下这几个css的代码：
/*页面主容器样式*/
#container{
width:90%;/*宽度*/
margin: 0 auto;/*边界auto为自动，这里用到了缩写形式意思为上下为0，
左右自动*/
}
/*页面头*/
#header{
width:780px;
height: 130px;
margin: 0 auto;
overflow:hidden;/*防止div被撑开，超过div大小就隐藏*/
background:#999999;/*背景色*/
}
/*页面中间*/
#midbody{
width:780px;
height: auto;
height:auto;
margin:0 auto;
overflow:hidden;
background: #990000;
}
/*页面底部*/
#foot{
width:780px;
height:100px;
margin:0 auto;
background: #99FFCC;
}
看完整体就要研究部分了，对于部分来说无非就是上下或左右结构了，例如下面的中间又分
为左右。
+------------------------------------+
| |
| header |
| |
|------------------------------------|
| | |
| | midbody |
| | |
|leftside| rightside |
| | |
| | |
| | |
| | |
|------------------------------------|
| |
| foot |
| |
+------------------------------------+
于是div结构可写成：
midbody中的leftside和rightside的css为：
#leftside{
width:220px;
float:left;/*该层位于外层的左边*/
height:500px;
background:#167692;
}
#rightside{
width:558px;
height:500px;
float:right;/*该层位于外层的右边*/
background: #CCCC00;
}
如果是这样的结构：
+------------------------------------+
| |
| header |
| |
|------------------------------------|
| | rightside |
| | rtop |
| | |
|leftside|---------------------------|
| | |rbottom |
| | left | right |
| | | |
| | | |
|------------------------------------|
| |
| foot |
| |
+------------------------------------+
则div结构为：
css is:
#rtop{
width:558px;
height:200px
margin:0 auto;
background: #CCCC00;
}
#rbottom{
width:558px;
height:300px;
margin:0 auto;
background: #CCee00;
}
#left{
width: 258px;
float:left;
height:300px;
background: #CCCCed;
}
#rightside{
width:300px;
height:300px;
float:right;
background: #Cdfd00;
}
It should be clear, right? As long as you understand that it is the same from the outermost layer to the inner layer.
The source file is in the attachment (index1.html is the style mentioned above, index.html is the style of using div to draw border lines)
Download attachment: div.rar
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