// Function to create arrays.
function makeArray(len) {
for (var i = 0; i < len; i++) this[i] = null;
this.length = len;
}
// The question object constructor function.
function makeQuestion(question, correctAnswer) {
var args = makeQuestion.arguments;
this.question = question;
this.correctAnswer = correctAnswer;
this.userAnswer = null;
this.isCorrect = isCorrect;
this.showForm = showForm;
this.userChoices = new makeArray(args.length - 2);
for (var i = 0; i < args.length - 2; i++) {
this.userChoices[i] = args[i + 2];
}
}
// Method to determine if question is answered correctly.
function isCorrect() {
if (this.correctAnswer == this.userAnswer) return true;
else return false;
}
// Method to display contents of question object.
function showForm(n) {
document.write('
' + (n + 1) + '. ' + this.question + '');
}
// Function to correct the quiz and display score, correct answers.
function correctQuiz() {
var correct = 0;
correctPage = 'Corrections';
correctPage += '';
for (var i = 0; i < quiz.length; i++) {
if (quiz[i].isCorrect()) correct++;
}
var score = Math.round((correct / quiz.length) * 100);
correctPage += 'Score: ' + score + ' %';
if (correct < quiz.length) {
correctPage += ifWrong;
for (var i = 0; i < quiz.length; i++) {
if (!quiz[i].isCorrect()) {
correctPage += (i + 1) + '. ' +
quiz[i].userChoices[quiz[i].correctAnswer] + '';
}
}
}
else correctPage += ifAced;
correctPage += '';
correctwin = window.open ('', '', 'height=300,width=300,scrollbars=yes');
if (correctwin.opener == null) correctwin.opener = window;
correctwin.location = 'javascript:opener.correctPage';
// stick this timer in to close the correct answer window after 10 seconds so it
// doesn't confound users by getting behind the main window somehow
hint_to = window.setTimeout("unWinHint()",10000);
}
function unWinHint() {
if (correctwin != null) if (correctwin.document != null)
correctwin.close();
}
// Message to display if quiz is aced.
var ifAced = "
Well done, ace.
";
// Message to display if any are wrong.
var ifWrong = "
Here are the correct answers to the questions you got wrong:
";