-5
我正在創建一個測驗模板，我將用於模塊評估。在這個過程中，我用單選按鈕創建了一個True/False問題。當我點擊分數按鈕來檢查我的答案時，我得到的屬性值「if」爲空或未定義，而不是一個Function對象。「我檢查了單選按鈕ID以確保它與我的If（ document.getElementById（'answer_true'）。checked）語句我用單選按鈕的所有其他選擇題都可以正常工作，我似乎無法指出問題的根源，分數按鈕調用check_tfQ函數並告訴我問題出在if語句任何幫助，將不勝感激屬性「if」的值爲空或未定義，而不是函數對象
<script language="JavaScript" type="text/javascript">
<!--
// variable declarations
score=0;
counter=0;
c=1;
correct="Correct! ";
incorrect="Incorrect! ";
// function declarations for each question
function Question1()
{
document.getElementById("main_ques").innerHTML="1. Put question 1 here.";
document.getElementById("choice1").innerHTML="Put answer 1.1 here.";
document.getElementById("choice2").innerHTML="Put answer 1.2 here.";
document.getElementById("choice3").innerHTML="Put answer 1.3 here.";
document.getElementById("counter").innerHTML="Counter is "+c;
}
function checkQ1()
{
c+=1;
if (document.getElementById('answer_a').checked)
{
score+=1;
document.getElementById("reply_b").innerHTML=correct;
document.getElementById("testscore").innerHTML=score;
}
else if (document.getElementById('answer_a').checked==false)
{
document.getElementById("reply_a").innerHTML=incorrect;
}
}
function Question2()
{
document.getElementById("main_ques").innerHTML="2. Put question two here.";
document.getElementById("choice1").innerHTML="Put answer 2.1 here.";
document.getElementById("choice2").innerHTML="Put answer 2.2 here.";
document.getElementById("choice3").innerHTML="Put answer 2.3 here.";
document.getElementById("counter").innerHTML="Counter is "+c;
}
function checkQ2()
{
c+=1;
if (document.getElementById('answer_a').checked)
{
score+=1;
document.getElementById("reply_b").innerHTML=correct;
document.getElementById("testscore").innerHTML=score;
}
else if (document.getElementById('answer_a').checked==false)
{
document.getElementById("reply_a").innerHTML=incorrect;
}
}
function Question3()
{
document.getElementById("main_ques").innerHTML="3. Put question 3 here.";
document.getElementById("choice1").innerHTML="Put answer 3.1 here.";
document.getElementById("choice2").innerHTML="Put answer 3.2 here.";
document.getElementById("choice3").innerHTML="Put answer 3.3 here.";
document.getElementById("counter").innerHTML="Counter is "+c;
}
function checkQ3()
{
c+=1;
if (document.getElementById('answer_b').checked)
{
score+=1;
document.getElementById("reply_b").innerHTML=correct;
document.getElementById("testscore").innerHTML=score;
}
else if (document.getElementById('answer_b').checked==false)
{
document.getElementById("reply_a").innerHTML=incorrect;
}
}
function Question4()
{
document.getElementById("main_ques").innerHTML="4. Put question 4 here.";
document.getElementById("choice1").innerHTML="Put answer 4.1 here.";
document.getElementById("choice2").innerHTML="Put answer 4.2 here.";
document.getElementById("choice3").innerHTML="Put answer 4.3 here.";
document.getElementById("counter").innerHTML="Counter is "+c;
}
function checkQ4()
{
c+=1;
if (document.getElementById('answer_a').checked)
{
score+=1;
document.getElementById("reply_b").innerHTML=correct;
document.getElementById("testscore").innerHTML=score;
}
else if (document.getElementById('answer_a').checked==false)
{
document.getElementById("reply_a").innerHTML=incorrect;
}
}
function Question5()
{
document.getElementById("main_ques").innerHTML="5. Put question 5 here.";
document.getElementById("choice1").innerHTML="Put answer 5.1 here.";
document.getElementById("choice2").innerHTML="Put answer 5.2 here.";
document.getElementById("choice3").innerHTML="Put answer 5.3 here.";
document.getElementById("counter").innerHTML="Counter is "+c;
}
function checkQ5()
{
c+=1;
if (document.getElementById('answer_a').checked)
{
score+=1;
document.getElementById("reply_b").innerHTML=correct;
document.getElementById("testscore").innerHTML=score;
}
else if (document.getElementById('answer_a').checked==false)
{
document.getElementById("reply_a").innerHTML=incorrect;
}
}
// function reveals fill in the blank question
function fitbQ()
{
document.getElementById("fitb_ques").style.visibility="visible";
document.getElementById("main_ques").innerHTML="";
document.getElementById("answer_a").style.visibility="hidden";
document.getElementById("answer_b").style.visibility="hidden";
document.getElementById("answer_c").style.visibility="hidden";
document.getElementById("choice1").innerHTML="";
document.getElementById("choice2").innerHTML="";
document.getElementById("choice3").innerHTML="";
document.getElementById("counter").innerHTML="Counter is "+c;
}
// function checks fill in the blank question
function check_fitbQ()
{
c+=1;
var fitb_answer=document.getElementById("fitb_ans").value;
if (fitb_answer=="balloon")
{
score+=1;
document.getElementById("reply_b").innerHTML=correct;
document.getElementById("testscore").innerHTML=score;
}
else if (document.getElementById("fitb_ans").checked==false)
{
document.getElementById("reply_a").innerHTML=incorrect;
}
}
// function for True/False question
function tfQ()
{
document.getElementById("main_ques").innerHTML="";
document.getElementById("fitb_ques").style.visibility="hidden";
document.getElementById("answer_a").style.visibility="hidden";
document.getElementById("answer_b").style.visibility="hidden";
document.getElementById("answer_c").style.visibility="hidden";
document.getElementById("choice1").innerHTML="";
document.getElementById("choice2").innerHTML="";
document.getElementById("choice3").innerHTML="";
document.getElementById("counter").innerHTML="Counter is "+c;
document.getElementById("tf_ques").innerHTML="7. Put question 7 here.";
document.getElementById("tf_ques").style.visibility="visible";
document.getElementById("T").style.visibility="visible";
document.getElementById("F").style.visibility="visible";
document.getElementById("answer_true").style.visibility="visible";
document.getElementById("answer_false").style.visibility="visible";
document.getElementById("T").innerHTML="True";
document.getElementById("F").innerHTML="False";
}
// function checks True/False question
function check_tfQ()
{
c+=1;
If (document.getElementById('answer_true').checked)
{
score+=1;
document.getElementById("reply_b").innerHTML=correct;
document.getElementById("testscore").innerHTML=score;
}
/* else if (document.getElementById("answer_true").checked==false)
{
document.getElementById("reply_a").innerHTML=incorrect;
} */
}
// function declaration for clearing the form
function clearform(form)
{
document.Questions.reset(form);
document.getElementById("reply_a").innerHTML="";
document.getElementById("reply_b").innerHTML="";
document.getElementById("testscore").innerHTML="";
}
// function declaration to disable all radio buttons after checking answers
function holdAnswers()
{
var obj=document.forms["Questions"];
for (i=0;i<obj.length;i++) {
with (obj[i]) {
if (type=='radio') {
disabled=true;
}
}
}
}
function releaseAnswers()
{
var obj=document.forms["Questions"];
for (i=0;i<obj.length;i++) {
with (obj[i]) {
if (type=='radio') {
disabled=false;
}
}
}
}
// function changes questions after each answer
function qlogger()
{
switch (c)
{
case 1:
Question1();
releaseAnswers();
document.getElementById("tally").disabled=false;
break;
case 2:
Question2();
releaseAnswers();
document.getElementById("tally").disabled=false;
break;
case 3:
Question3();
releaseAnswers();
document.getElementById("tally").disabled=false;
break;
case 4:
Question4();
releaseAnswers();
document.getElementById("tally").disabled=false;
break;
case 5:
Question5();
releaseAnswers();
document.getElementById("tally").disabled=false;
break;
case 6:
fitbQ();
releaseAnswers();
document.getElementById("tally").disabled=false;
break;
case 7:
tfQ();
releaseAnswers();
document.getElementById("tally").disabled=false;
break;
case 8:
results(score,c);
break;
}
}
//function declaration to check all answers to questions and provide output
function checkAll(c)
{
switch (c)
{
case 1:
checkQ1();
break;
case 2:
checkQ2();
break;
case 3:
checkQ3();
break;
case 4:
checkQ4();
break;
case 5:
checkQ5();
break;
case 6:
check_fitbQ();
break;
case 7:
check_tfQ();
break;
case 8:
results();
}
holdAnswers();
document.getElementById("tally").disabled=true;
}
function results(score,c)
{
grade=Math.round((score/(c-1))*100);
document.getElementById("main_ques").innerHTML="";
document.getElementById("answer_a").style.visibility="hidden";
document.getElementById("answer_b").style.visibility="hidden";
document.getElementById("answer_c").style.visibility="hidden";
document.getElementById("choice1").innerHTML="";
document.getElementById("choice2").innerHTML="";
document.getElementById("choice3").innerHTML="";
document.getElementById("counter").innerHTML="";
document.getElementById("tally").style.visibility="hidden";
if (grade>=80)
{
document.getElementById("results1").innerHTML="Congratulations! <br/>";
document.getElementById("results2").innerHTML="You passed with a score of "+ grade+"%";
}
else
{
document.getElementById("results1").innerHTML="Sorry. <br>";
document.getElementById("results2").innerHTML="You failed with a score of "+grade+"%";
}
}
//-->
</script>
</head>
<body onload="clearform(); qlogger()">
<div id="title">Module Title</div>
<div id="subtitle">Module Subtitle</div>
<div class="questions">
<form name="Questions">
<!-- Multiple choice question placeholder is here -->
<div id="main_ques">1. Please state your question here?</div>
<!-- Correct or Incorrect response -->
<div id="reply_a" class="response"></div>
<div id="reply_b" class="response2"></div>
<!-- Test score displays here -->
<div id="testscore" class="showscore"></div>
<!-- Test results displays here -->
<div id="results1" class="results1"></div>
<div id="results2" class="results2"></div>
<br>
<!-- Multiple choice radio buttons go here -->
<input type="radio" name="Q_ans" id="answer_a" class="answer_a" value="ans_a"/><br><div id="choice1" class="choice1"></div>
<input type="radio" name="Q_ans" id="answer_b" class="answer_b" value="ans_b"/><br><div id="choice2" class="choice2"></div>
<input type="radio" name="Q_ans" id="answer_c" class="answer_c" value="ans_c"/><br><div id="choice3" class="choice3"></div>
<!-- Put fill in the blank question here -->
<div id="fitb_ques" class="fitb_ques">6. Please state your fill in the <input name="fitb_ans" id="fitb_ans"> question here.</div>
<!-- Put True/False question here -->
<div id="tf_ques" class="tf_ques">7. Please state your T/F question here.</div>
<input type="radio" name="TF_ans" id="answer_true" class="true_btn" value="true_ans"/><br><div id="T" class="T">Put choice one here.</div>
<input type="radio" name="TF_ans" id="answer_false" class="false_btn" value="false_ans"/><br><div id="F" class="F">Put choice two here.</div>
<div id="counter"></div>
<br>
<input type="button" name="tally" id="tally" value="score" onclick="checkAll(c)">
</form>
</div>
<div id="nextbutton">
<input type="image" src="pics/next_button.png" alt="Next Button" height="50" width="120" onclick="clearform();qlogger()">
</div>
</body>
</html>
在哪一行？你真的希望我們閱讀所有的縮進代碼嗎？ – Femaref
格式化您的代碼將使其人們更容易幫助您十億倍...... – jahroy
將來，請嘗試將您發佈的代碼限制爲僅適用於相關的代碼。通過幾十（或幾百）行無關代碼來查找重要部分是非常困難的。例如，在這種情況下，由於調用'check_tfQ（）'時發生問題，所以您只能發佈該函數。 –