php课程---随机数 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>

<body>
<div id="sj"></div>
<input type="button" value="开始" onclick="ShowNumber()" />
</body>

<script type="text/javascript">
var arr = new Array(
        "0","1","2","3","4","5","6","7","8","9"
    );
var bs = 0;
function ShowNumber()
{
    var bian = Math.floor( Math.random()*10);
    
    var s = document.getElementById("sj");
    
    s.innerText = arr[bian];
    
    bs = bs+1;
    
    //s.innerText = bs;
    
    if(bs==5)
    {
        window.clearTimeout(jian);
    }
    else
    {
        var jian = window.setTimeout("ShowNumber()",30);
    }
    
    
    
}
</script>
</html>

点击开始按钮后，会得到一个随机数，刷新之后还可以得到另一个

posted @ 2016-02-21 20:43  秦萧不再  阅读(171)  评论(0)  编辑  收藏  举报