use*_*464 6 html javascript css timer
我正在尝试使用 html 和 JavaScript 为我的在线考试页面设置一个“计时器”，您可以在其中看到下面的代码。但我有问题：
问题 ：
a) 我需要显示在固定时间完成考试的时间。如果考官不能按时完成考试，那么页面应该显示“时间到”的提示信息，并且必须显示最后一页用户尝试的总答案、用户完成考试的等级和时间。
b）我们可以在我的页面底部看到运行如下“你的剩余时间是：1 分钟：53 秒”，我保留了min=1。但它显示你的剩余时间是 0 分钟：59 秒，因为我保持 min=1
c) 在这里我想用小时、分钟和秒显示完美的时间，如果将来小时、分钟和秒有任何变化。
JSFiddle：https ://jsfiddle.net/fs6xaeox/
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UFT-8">
<link rel="stylesheet" href="menu.css">
<link rel="stylesheet" href="layout.css">
<script>
var pos = 0, test, test_status, question, choice, choices, chA, chB, chC, correct = 0;
var questions = [
[ "Which of the following a is not a keyword in Java ?", "class", "interface", "extends", "C" ],
[ "Which of the following is an interface ?", "Thread", "Date", "Calender", "A" ],
[ "Which company released Java Version 8 ?", "Sun", "Oracle", "Adobe", "A" ],
[ "What is the length of Java datatype int ?", "32 bit", "16 bit", "None", "C" ],
[ "What is the default value of Java datatype boolean?","true","false","0","A"]
];
function _(x){
return document.getElementById(x);
}
function renderQuestion(){
test = _("test");
var showscore=Math.round(correct/questions.length*100);
if(pos >= questions.length){
document.getElementById("online_start").src = "animatedthankyou.gif";
test.innerHTML = "<h3>You got "+correct+" correct of "+questions.length+" questions</h3>";
test.innerHTML += "<h3> Your Grade : "+showscore +"% </h3>";
test.innerHTML +="<h4>Exam Finished in Time:" + sec+" Seconds</h4>";
test.innerHTML += "<button onclick='EndExam()'>End the Exam</button>";
_("test_status").innerHTML = "<h3>Test Completed</h3>";
pos = 0;
correct = 0;
clearTimeout(tim);
//document.getElementById("endtime").innerHTML = "<h4>Finished Time:"+min+" Minutes :" + sec+" Seconds</h4>";
document.getElementById("starttime").style.display += 'none';
document.getElementById("showtime").style.display += 'none';
//document.getElementById("showtime").style.display += 'block';
return false;
}
_("test_status").innerHTML = "<h3>Question "+(pos+1)+" of "+questions.length+"</h3>";
question = questions[pos][0];
chA = questions[pos][1];
chB = questions[pos][2];
chC = questions[pos][3];
test.innerHTML = "<h3>"+question+"</h3>";
test.innerHTML += "<input type='radio' name='choices' value='A'> "+chA+"<br>";
test.innerHTML += "<input type='radio' name='choices' value='B'> "+chB+"<br>";
test.innerHTML += "<input type='radio' name='choices' value='C'> "+chC+"<br><br>";
test.innerHTML += "<button onclick='checkAnswer()'>Next</button><br><br>";
}
function checkAnswer(){
choices = document.getElementsByName("choices");
choice=-1;
for(var i=0; i<choices.length; i++){
if(choices[i].checked){
choice = choices[i].value;
}
}
if(choice == questions[pos][4]){
correct++;
}
pos++;
renderQuestion();
}
window.addEventListener("load", renderQuestion, false);
function EndExam(){
location.href="Loginpage.htm";
}
var tim;
var showscore=Math.round(correct/questions.length*100);
var min = 1;
var sec = 60;
var f = new Date();
function starttime() {
showtime();
document.getElementById("starttime").innerHTML = "<h4>You started your Exam at " + f.getHours() + ":" + f.getMinutes()+"</h4>";
}
function showtime() {
if (parseInt(sec) > 0) {
sec = parseInt(sec) - 1;
document.getElementById("showtime").innerHTML = "Your Left Time is :"+min+" Minutes :" + sec+" Seconds";
tim = setTimeout("showtime()", 1000);
}
else {
if (parseInt(sec) == 0) {
min = parseInt(min) - 1;
document.getElementById("showtime").innerHTML = "Your Left Time is :"+min+" Minutes :" + sec+" Seconds";
if (parseInt(min) == 0) {
clearTimeout(tim);
alert("Time Up");
/*_("test_status").innerHTML = "Test Completed";
test.innerHTML = "<h2>You got "+correct+" of "+questions.length+" questions correct</h2>";
test.innerHTML = "<h2>You got "+showscore +"% out of "+questions.length+"</h2>";
test.innerHTML = "<button onclick='EndExam()'>End the Exam</button>";
pos = 0;
correct = 0;
clearTimeout(tim);
document.getElementById("endtime").innerHTML = "You Finished exam at Time is :"+min+" Minutes :" + sec+" Seconds";
document.getElementById("starttime").style.display += 'none';
document.getElementById("showtime").style.display += 'none';
//document.getElementById("showtime").style.display += 'block';
return false;*/
window.location.href = "Loginpage.htm";
}
else {
sec = 60;
document.getElementById("showtime").innerHTML = "Your Left Time is :" + min + " Minutes :" + sec + " Seconds";
tim = setTimeout("showtime()", 1000);
}
}
}
}
</script>
</head>
<body onload="starttime()" >
<div id="Holder">
<div id="Header"></div>
<div id="NavBar">
<nav>
<ul>
<li><a href="Loginpage.htm"> Login</a></li>
<li><a href="Registrationpage.htm">Registration</a></li>
</ul>
</div>
<div id="Content">
<div id="PageHeading">
<h1><marquee direction="right" behavior="alternate">All the Best</marquee></h1>
</div>
<div id="ContentLeft">
<h2></h2><br>
<img id="online_start">
<br>
<h6>Online Examination System(OES) is a Multiple Choice Questions(MCQ) based
examination system that provides an easy to use environment for both
Test Conducters and Students appearing for Examination.</h6>
</div>
<div id="ContentRight">
<section class="loginform_cf">
<table>
<tr>
<td id="test_status" style="text-align:left" ></td>
<td id="starttime" style="text-align:right"></td>
</tr>
<tr>
<td id="test" colspan="2"></td>
</tr>
</table>
<div id="showtime" ></div>
</section>
</div>
</div>
<div id="Footer">Developed by - K.P.RAJU</div>
</div>
</body>
</html>
可以帮助解决这个问题。
小智 3
首先，您可能最好使用 PHP 或使用测试构建程序。这只是因为我可以通过输入我自己的剩余时间或绕过时间结束部分来欺骗计时器。作为一名学生，请相信我，如果这件事被发现，你将永远无法参加考试。
这里你指定它们只剩下 60 秒，因为你在显示时间时调用 sec 的值，而不是实际的当前时间
else {
sec = 60;
应该是时间吧？
tim = setTimeout("....
我可能错过了其他事情，所以请回来告诉我是否有任何帮助
| 归档时间： |
|
| 查看次数： |
7294 次 |
| 最近记录： |