css浮动的实例

css浮动

结论，非浮动元素可以为后面的浮动元素定位， 但是 浮动元素无法再为其后的非浮动元素定位。

No-float A + Float B + No-float C

c和b 会按照A的边界进行定位，

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"
HTMLHEADTITLECSS TEST/TITLE
style type=text/css
body{
text-align: center;
background: #000;
}
#container{
width:778px;
background: #e3e3e3;
margin:0px auto;
}
#idParentDiv{
width:760px;
margin:0px auto;
text-align:left;
}
#boxleft{
width:200px;
height:80px;
background-color:yellow;
}
#boxmiddle{
float:left;
width:250px;
height:100px;
background-color:red;
}
#boxright{
width:250px;
height:120px;
background-color:blue;
}
/style
body
div id=container
        div id=idParentDiv
                div id=boxleftboxleft---width:200px;height:20px;color:#FFFFFF;background-color:yellow;letter-spacing:0px;  /div
                div id=boxmiddleboxmiddle---float:left;width:250px;height:30px;background-color:red;/div
                div id=boxrightboxright----width:250px;height:50px;background-color:blue;/div
        /div
/div
/body
/html

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