日期:2014-05-16 浏览次数:20442 次
??????? 使用JS实现这个小程序,其实还是比较简单的,主要用到了window对象中的setTimeout()方法和clearTimeout()方法,其它的便是关于时、分、秒算法的问题,方法有很多,在这里我只采用其中一种比较简单的方法。
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'demo4.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> <script type="text/javascript"> var vartime, h, m, s, hstr, mstr, sstr; var xtime = 1.5 * 60 * 60; function timeclock() { if (xtime >= 0) { h = parseInt(xtime / 3600); m = parseInt((xtime % 3600) / 60); s = (xtime % 3600) % 60; hstr = h < 10 ? ("0" + h) : h; mstr = m < 10 ? ("0" + m) : m; sstr = s < 10 ? ("0" + s) : s vartime = hstr + ":" + mstr + ":" + sstr; document.getElementById("timer").value = vartime; xtime--; setTimeout("timeclock();", 1000); } else { clearTimeout("timeclock();") var flag = confirm("时间到,单击“确定”以提交"); if (flag) { document.forms[0].submit(); } else { window.close("./demo.jsp"); } } } </script> </head> <body> <center> <form action="./index.jsp" method="post"> 剩余时间: <input type="text" id="timer" name="txt" size="4" readonly="readonly" /> <input type="button" value="开始" onclick="timeclock();" /> </form> </center> </body> </html>
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