时间：2021-03-15 09:49:36 | 栏目：JavaScript代码 | 点击：次
实例如下：
<script>
var imgs =["http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_2.jpg",
"http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_default.png",
"http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_3.jpg",
"http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_1.jpg",
"http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_4.jpg",
"http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_5.jpg",
"http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_6.jpg",
"http://images.cnblogs.com/cnblogs_com/xiaobo-Linux/1112236/o_default-2.jpg",
];
var index=Math.floor(Math.random()*8);
var img = imgs[index];
function time(){
document.body.style.backgroundImage="url("+img+")";
}
document.body.onload = function(){
time();
}
</script>