Javascript 我需要帮助，使自动提交测验使用计时器
大家好，我有一个测验系统，我希望测验将自动提交后，时间结束这是我的代码，但它不工作Javascript 我需要帮助，使自动提交测验使用计时器,javascript,php,html,Javascript,Php,Html,大家好，我有一个测验系统，我希望测验将自动提交后，时间结束这是我的代码，但它不工作 <script type="text/javascript"> function countDown(secs, elem) { var element = document.getElementById(elem); element.innerHTML = "<h2>You have <b>"+secs+"</b> seconds to
<script type="text/javascript">
function countDown(secs, elem)
{
var element = document.getElementById(elem);
element.innerHTML = "<h2>You have <b>"+secs+"</b> seconds to answer the questions</h2>";
if(secs < 1) {
document.quiz.submit();
}
else
{
secs--;
setTimeout('countDown('+secs+',"'+elem+'")',1500);
}
}
function validate() {
return true;
}
</script>
<div id="status"></div>
<script type="text/javascript">countDown(4,"status");</script>
<title>Questionnaire</title>
<style type="text/css">
span {
color: #FF00CC;
}
</style>
<body>
<br />
<div class="col-sm-8">
<div class="panel panel-black">
<?php
include("db_conn.php");
$query="select * from question";
$rs=mysql_query("select * from question where test_id=$tid",$cn) or die(mysql_error());
if(!isset($_SESSION[qn]))
{
$_SESSION[qn]=0;
mysql_query("delete from useranswer where sess_id='" . session_id() ."'") or die(mysql_error());
$_SESSION[trueans]=0;
}
else
{
if($submit=='Next Question' && isset($ans))
{
mysql_data_seek($rs,$_SESSION[qn]);
$row= mysql_fetch_row($rs);
mysql_query("insert into useranswer(sess_id, test_id, que_des, ans1,ans2,ans3,ans4,true_ans,your_ans) values ('".session_id()."', $tid,'$row[2]','$row[3]','$row[4]','$row[5]', '$row[6]','$row[7]','$ans')") or die(mysql_error());
if($ans==$row[7])
{
$_SESSION[trueans]=$_SESSION[trueans]+1;
}
$_SESSION[qn]=$_SESSION[qn]+1;
}
else if($submit=='Get Result' && isset($ans))
{
mysql_data_seek($rs,$_SESSION[qn]);
$row= mysql_fetch_row($rs);
mysql_query("insert into useranswer(sess_id, test_id, que_des, ans1,ans2,ans3,ans4,true_ans,your_ans) values ('".session_id()."', $tid,'$row[2]','$row[3]','$row[4]','$row[5]', '$row[6]','$row[7]','$ans')") or die(mysql_error());
if($ans==$row[7])
{
$_SESSION[trueans]=$_SESSION[trueans]+1;
}
echo "<h1 class=head1> Result</h1>";
$_SESSION[qn]=$_SESSION[qn]+1;
echo "<Table align=center><tr class=tot><td>Total Question<td> $_SESSION[qn]";
echo "<tr class=tans><td>True Answer<td>".$_SESSION[trueans];
$w=$_SESSION[qn]-$_SESSION[trueans];
echo "<tr class=fans><td>Wrong Answer<td> ". $w;
echo "</table>";
mysql_query("insert into result(login,test_id,test_date,score) values('$login',$tid,'".date("d/m/Y")."',$_SESSION[trueans])") or die(mysql_error());
unset($_SESSION[qn]);
unset($_SESSION[sid]);
unset($_SESSION[tid]);
unset($_SESSION[trueans]);
exit;
}
}
$rs=mysql_query("select * from question where test_id=$tid",$cn) or die(mysql_error());
if($_SESSION[qn]>mysql_num_rows($rs)-1)
{
unset($_SESSION[qn]);
echo "<h1 class=head1>Some Error Occured</h1>";
session_destroy();
echo "Please <a href=test.php> Start Again</a>";
exit;
}
mysql_data_seek($rs,$_SESSION[qn]);
$row= mysql_fetch_row($rs);
echo "<form name=quiz method=post action=quiz.php onsubmit=return validate()>";
echo "<table width=100%> <tr> <td width=30> <td> <table border=0>";
$n=$_SESSION[qn]+1;
echo "<tR><td><span class=style2>Que ". $n .": $row[2]</style>";
echo "<tr><td class=style8><input type=radio name=ans value=1>$row[3]";
echo "<tr><td class=style8> <input type=radio name=ans value=2>$row[4]";
echo "<tr><td class=style8><input type=radio name=ans value=3>$row[5]";
echo "<tr><td class=style8><input type=radio name=ans value=4>$row[6]";
if($_SESSION[qn]<mysql_num_rows($rs)-1)
echo "<tr><td><input type=submit name=submit class='btn btn-lg btn-black' value='Next Question'></form>";
else
echo "<tr><td><input type=submit name=submit class='btn btn-lg btn-black' value='Get Result'></form>";
echo "</table></table>";
?>
</div>
</div>
功能倒计时（秒、元素）
{
var元素=document.getElementById（elem）；
element.innerHTML=“您有“+secs+”秒时间回答问题”；
如果（秒<1）{
document.quick.submit（）；
}
其他的
{
秒--；
setTimeout（'倒计时（'+secs+'，“'+elem+”），1500）；
}
}
函数验证（）{
返回true；
}
倒计时（4，“状态”）；
问卷调查
span{
颜色：#FF00CC；
}
使用setInterval
代替setTimeout
。因为如果使用setTimeout，您的倒计时功能将只启动一次
setInterval(function() {
countDown(secs, elem)
},1500);