小而简单的问题。我得到了这些 CSS 规则。
html {
background-image:url('../images/background1.jpg');
-webkit-background-size: cover;
-o-background-size: cover;
background-size: cover;
}
body {
font-family: Arial, Helvetica, sans-serif;
font-size: 100%;
margin-top: 5px;
margin-left: auto;
margin-right: auto;
width: 960px;
border: 3px solid rgb(75,75,75);
box-shadow: 0 0 15px 5px rgba(40,80,100,.75);
-moz-border-radius-bottomleft: 10px;
border-bottom-left-radius: 10px;
-moz-border-radius-bottomrightt: 10px;
border-bottom-right-radius: 10px;
background:url('../images/background4.jpg');
background-size: cover;
min-height: 900px;
height:auto;
}
现在我只想添加侧面,而不是正文,而是相对定位的广告框……我该怎么做?提前谢谢