html---三列布局

三列布局 1一

1.两边固定 当中自适应
2.当中列要完整显示
3.当中列要优先加载

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>

        <style type="text/css">

            *{
                margin: ;
                padding: ;
            }
            body{
                /*2*left+right*/
                min-width: 600px;
            }
            div{
                height: 100px;
            }
            #left,#right{
                width: 200px;
                background: pink;
            }
            #left{
                float: left;
            }
            #right{
                float: right;
            }
            #middle{
                background: deeppink;
            }
        </style>
    </head>
    <body>
        <div id="middle">middle</div>
        <div id="left">left</div>
        <div id="right">right</div>
    </body>
</html>

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三列布局2二

1.两边固定 当中自适应
2.当中列要完整显示

<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8">
        <title></title>

        <style type="text/css">

            *{
                margin: ;
                padding: ;
            }
            body{
                /*2*left+right*/
                min-width: 600px;
            }
            div{
                height: 100px;
            }
            #left,#right{
                width: 200px;
                background: pink;
            }
            #middle{
                background: deeppink;
                padding:  200px;
            }
            #left{
                position: absolute;
                left: ;
                top: ;
            }
            #right{
                position: absolute;
                right: ;
                top: ;
            }
        </style>
    </head>
    <body style="position: relative;">
        <div id="left">left</div>
        <div id="middle">middle</div>
        <div id="right">right</div>
    </body>
</html>