CSS 背景 

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <link rel="stylesheet" type="text/css" href="css_back.css"/>
    </head>
    <body>
        <div id="div1">
            this is a text
        </div>
    </body>
</html>
body{
    /* 默认水平垂直都重复 */
    background-image: url(img.jpg);
    /* 仅在水平重复 */
    background-repeat: repeat-x;
    background-position: bottom;
    /* 固定fixed 还是随页面滚动 scroll */
    background-attachment: fixed;
}
#div1{
    background-color: green;
    opacity: 0.5;/*透明度*/ 
    background: rgba(0, 128, 0, 0.3) /*背景色透明*/
}

 

posted @ 2022-02-28 21:06  lwx_R  阅读(10)  评论(0)  编辑  收藏  举报