JavaScript 抽奖效果实现代码 数字跳动版_javascript技巧

<title>JavaScript实现的抽奖效果 数字跳动版 </title> <meta http-equiv="Content-Type" content="text/html; charset=GB2312"> <style type="text/css"> .a1 {}{ position: relative; font-family: Verdana; font-size: 200px; color: #888888; } </style> <script language="JavaScript"> function Lottery() { var Nos = Math.round(Math.random() * (4999 - 1) + 1); var result = document.getElementById("layer1"); if (result != null) { result.innerHTML = Nos; } T = setTimeout('Lottery()', 10); } //--> </script> <div> <input type="button" value="Lottery Number Picker" onclick="Lottery();setTimeout('clearTimeout(T)',2000);"> </div> <div> <span id="layer1" class="a1">Result</span> </div>