Here is a quiz with 5 questions, i want to make it in such a way that when you load the page, only 3 questions appears and when you refresh it, the questions are randomly displayed. and the score is calculated for the displayed quiz.
Here is my code


<HEAD>

<style type="text/css">
<!--
.bgclr {background-color: white; color: black; font-weight: bold;}
-->
</style>

<script language="JavaScript">

<!-- Begin
// Insert number of questions
var numQues = 5;

// Insert number of choices in each question
var numChoi = 3;

// Insert number of questions displayed in answer area
var answers = new Array(4);

// Insert answers to questions
answers[0] = "Cascading Style Sheets";
answers[1] = "Dynamic HTML";
answers[2] = "Netscape";
answers[3] = "Common Gateway Interface";
answers[4] = "Database Management System";

// Do not change anything below here ...
function getScore(form) {
var score = 0;
var currElt;
var currSelection;
for (i=0; i<numQues; i++) {
currElt = i*numChoi;
for (j=0; j<numChoi; j++) {
currSelection = form.elements[currElt + j];
if (currSelection.checked) {
if (currSelection.value == answers[i]) {
score++;
break;
}
}
}
}
score = Math.round(score/numQues*100);
form.percentage.value = score + "%";
var correctAnswers = "";
for (i=1; i<=numQues; i++) {
correctAnswers += i + ". " + answers[i-1] + "\r\n";
}
form.solutions.value = correctAnswers;
}
// End -->
</script>

</HEAD>

<!-- STEP TWO: Copy this code into the BODY of your HTML document -->

<BODY>

<h3>Web Design Quiz</h3>

<form name="quiz">
1. What does CSS stand for?
<ul style="margin-top: 1pt">
<li><input type="radio" name="q1" value="Colorful Style Symbols">Colorful Style Symbols</li>
<li><input type="radio" name="q1" value="Cascading Style Sheets">Cascading Style Sheets</li>
<li><input type="radio" name="q1" value="Computer Style Symbols">Computer Style Symbols</li>
</ul>

2. What does DHTML stand for?
<ul style="margin-top: 1pt">
<li><input type="radio" name="q2" value="Dramatic HTML">Dramatic HTML</li>
<li><input type="radio" name="q2" value="Design HTML">Design HTML</li>
<li><input type="radio" name="q2" value="Dynamic HTML">Dynamic HTML</li>
</ul>
3. Who created Javascript?
<ul style="margin-top: 1pt">
<li><input type="radio" name="q3" value="Microsoft">Microsoft</li>
<li><input type="radio" name="q3" value="Netscape">Netscape</li>
<li><input type="radio" name="q3" value="Sun Micro Systems">Sun Micro Systems</li>
</ul>
4. What does CGI stand for?
<ul style="margin-top: 1pt">
<li><input type="radio" name="q4" value="Cascading Gate Interaction">Cascading Gate Interaction</li>
<li><input type="radio" name="q4" value="Common GIF Interface">Common GIF Interface</li>
<li><input type="radio" name="q4" value="Common Gateway Interface">Common Gateway Interface</li>
</ul>
5. What does DBMS stand for?
<ul style="margin-top: 1pt">
<li><input type="radio" name="q5" value="Cascading Gate Interaction">Database Management System</li>
<li><input type="radio" name="q5" value="Common GIF Interface">Common GIF Interface</li>
<li><input type="radio" name="q5" value="Common Gateway Interface">Common Gateway Interface</li>
</ul>
<input type="button" value="Get score" onClick="getScore(this.form)">
<input type="reset" value="Clear answers">
<p> Score = <strong><input class="bgclr" type="text" size="5" name="percentage" disabled></strong><br><br>
Correct answers:<br>
<textarea class="bgclr" name="solutions" wrap="virtual" rows="5" cols="30" disabled>
</textarea>
</form>