<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<style>
div{
width: 100%;
height: 200px;
background-image: ;
background-size: 100% 100%;
}
</style>
</head>
<body>
<div id="preView" width="100%" height="500px">
</div>
<script type="text/javascript">
var bodyBgs = []; //创建一个数组变量来存储背景图片的路径
bodyBgs[0] = "img/b_img.jpg";
bodyBgs[1] = "img/b_ing2.jpg";
//Math.round四舍五入取整；Math.random()取随机数；
//下边是取0-1之间的随机数
var randomBgIndex = Math.round(Math.random()*1);
var imgsr=bodyBgs[randomBgIndex];
$("#preView").css({"background-image":"url("+imgsr+")"});
</script>
</body>
</html>
时间： 2025-01-04 10:52:00