Create javascript timer for online examination

Question

1.00/5 (2 votes)

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i am developing a php application. but i cannot create a timer that the session can use for all the questions. i have seen some code but on refresh of the page, it starts counting again

What I have tried:

i have pretty done alot of research on what to do, for now everything seem abortive. the javascript will start counting again once the page is refreshed

Posted 17-Mar-16 12:24pm

Member 12400101

Updated 12-Nov-21 22:59pm

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Patrice T 17-Mar-16 18:38pm

Show you code!
There so many tutorials on internet that it is unbelievable that you didn't found something working.

3 solutions

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tungpns · Answer 1 · 2023-10-04T20:19:00

Based on Solution 1 but I fixed many errors

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script language ="javascript" >
        var tim;
       
        var min = 0;
        var sec = 6;
        var f = new Date();
        function f1() {
            f2();
            document.getElementById("starttime").innerHTML = "Your started your Exam at " + f.getHours() + ":" + f.getMinutes();
             
          
        }
        function f2() {
        	debugger;
            if (parseInt(sec) > 0) {
                sec = parseInt(sec) - 1;
                document.getElementById("showtime").innerHTML = "Your Left Time  is "+ (min < 10 ? "0" + min : min) +":" + (sec < 10 ? "0" + sec : sec);
                tim = setTimeout("f2()", 1000);
            }
            else {
                if (parseInt(sec) == 0) {
                    min = parseInt(min) - 1;
                    if (parseInt(min) < 0) {
                        clearTimeout(tim);
                        document.getElementById("showtime").innerHTML = "Times up";
                        //location.href="/KB/answers/default5.aspx";
                    }
                    else {
                        sec = 59;
                        document.getElementById("showtime").innerHTML = "Your Left Time  is "+ (min < 10 ? "0" + min : min) +":" + (sec < 10 ? "0" + sec : sec);
                        tim = setTimeout("f2()", 1000);
                    }
                }
               
            }
        }
    </script>
</head>
<body onload="f1()" >
    <form id="form1" runat="server">
    <div>
      <table width="100%" align="center">
        <tr>
          <td colspan="2">
            <h2>This is head part for showing timer and all other details</h2>
          </td>
        </tr>
        <tr>
          <td>
            <div id="starttime"></div>
 
            <div id="endtime"></div>
 
            <div id="showtime"></div>
          </td>
        </tr>
        <tr>
          <td>
          </td>
        </tr>
      </table>
    </div>
    </form>
</body>
</html>

Member 15429039 · Answer 2 · 2021-11-12T22:59:00

Your Code is Nice..Bt The exam timer stop before 1 min left to complete the examination..

I like to to change this section of code

if (parseInt(sec) == 0) {
min = parseInt(min) - 1;
if (parseInt(min) == 0)
{
clearTimeout(tim);
location.href="/KB/answers/default5.aspx";

}
Like below

if (parseInt(sec) == 0) {
min = parseInt(min) - 1;
if (parseInt(min) == -1)
{
clearTimeout(tim);
location.href="/KB/answers/default5.aspx";
}

I just change a single value is to get the expected output..That is,
if (parseInt(min) == -0) To if (parseInt(min) == -1)

koolprasad2003 · Answer 3 · 2016-03-17T18:23:00

what about 'setTimeout' method in javascript ? have you tried once ?
checkout below count down timer code snippet see if it works for you

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script language ="javascript" >
        var tim;
       
        var min = 20;
        var sec = 60;
        var f = new Date();
        function f1() {
            f2();
            document.getElementById("starttime").innerHTML = "Your started your Exam at " + f.getHours() + ":" + f.getMinutes();
             
          
        }
        function f2() {
            if (parseInt(sec) > 0) {
                sec = parseInt(sec) - 1;
                document.getElementById("showtime").innerHTML = "Your Left Time  is :"+min+" Minutes ," + sec+" Seconds";
                tim = setTimeout("f2()", 1000);
            }
            else {
                if (parseInt(sec) == 0) {
                    min = parseInt(min) - 1;
                    if (parseInt(min) == 0) {
                        clearTimeout(tim);
                        location.href = "default5.aspx";
                    }
                    else {
                        sec = 60;
                        document.getElementById("showtime").innerHTML = "Your Left Time  is :" + min + " Minutes ," + sec + " Seconds";
                        tim = setTimeout("f2()", 1000);
                    }
                }
               
            }
        }
    </script>
</head>
<body onload="f1()" >
    <form id="form1" runat="server">
    <div>
      <table width="100%" align="center">
        <tr>
          <td colspan="2">
            <h2>This is head part for showing timer and all other details</h2>
          </td>
        </tr>
        <tr>
          <td>
            <div id="starttime"></div>
 
            <div id="endtime"></div>
 
            <div id="showtime"></div>
          </td>
        </tr>
        <tr>
          <td>
          </td>
        </tr>
      </table>
    </div>
    </form>
</body>
</html>

Create javascript timer for online examination

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