边界和边框

1、边界

margin表外间距

    <body>
     <div style="width:100px; height:100px; background-color:#F00; margin:10px">
     </div>
     <div style="width:100px; height:100px; background-color:#F00;margin:10px">
     </div>
    </body>

padding内容与单元格之间的间距（当用padding时，宽高要减去设置的padding值；不然表格就是比原来的大，大出的数值就是设置的padding值）

    <body>
     <div style="width:50px; height:50px; background-color:#F00; padding:25px 25px 25px 25px ">
     <div style="width:50px; height:50px; background-color:#00F"></div>
     </div>
    </body>

用div布置网页是首先要给网页的margin和padding清零并居中（写在head里面）auto是居中

    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>无标题文档</title>
        <style type="text/css">
        *{ margin:0 auto; padding:o}
        </style>
    </head>
    
    <body>
     <div style="width:100px; height:75px; background-color:#F00; padding-top:25px ">
     <div style="width:50px; height:50px; background-color:#00F;"></div>
     </div>
    </body>

margin：10px 5px 10px 5px ； padding：10px 5px 10px 5px 意思是上右下左（顺时针）为10、5、10、5

2、边框border，属性有border-width border-style border-color border-top /bottom /left /right

    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>无标题文档</title>
        <style type="text/css">
        *{ margin:0 auto; padding:o}
        </style>
    </head>
    
    <body>
     <div style="width:100px; height:75px; background-color:#F00; padding-top:25px; border-width:5px; border-color:#0F0; border-style:solid ">
     <div style="width:50px; height:50px; background-color:#00F;"></div>
     </div>
    </body>

bord：像素边框样式颜色

    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>无标题文档</title>
        <style type="text/css">
        *{ margin:0 auto; padding:o}
        </style>
    </head>
    
    <body>
     <div style="width:100px; height:75px; background-color:#F00; padding-top:25px; border:10px  outset #000">
     <div style="width:50px; height:50px; background-color:#00F;"></div>
     </div>
    </body>

当有边框的时候，设置margin值要减掉边框的宽

    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>无标题文档</title>
        <style type="text/css">
        *{ margin:0 auto; padding:o}
        </style>
    </head>
    
    <body>
     <div style="width:200px; height:200px; background-color:#F00;border:10px  outset #000; margin-top:50px">
     <div style="width:100px; height:100px; background-color:#00F; margin:30px; border:20px  solid #000000"></div>
     </div>
    </body>

当div中宽高都是0边框不等于0时

    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <title>无标题文档</title>
        <style type="text/css">
        *{ margin:0 auto; padding:o}
        </style>
    </head>
    
    <body>
     <div style="width:0px; height:0px;margin-top:100px; border-bottom:100px solid #0F0; border-top:100px solid #F00; border-left:100px solid #00C; border-right:100px solid #FF0">
     </div>
    </body>

posted @ 2017-10-10 19:42 navyyouth 阅读(267) 评论(0) 编辑收藏举报

navyyouth

边界和边框

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