// Define global variables and arrays
var questionIndex = 0;
var checker = true;
var keeper = new Array();
var performance = new Array('No offense, but you are really weak. More effort needed.','Few have done worse.','You are \"meteorology\"-impaired.','You need some real work.','You\'re better than some, but not too many.','You\'re better than some, but not many.','You\'ve done a good job!.','Very Good!','You are an exhalted number guru.');
var correctAnswers = 0;
var jsAbility;
var preventer = 1;
var spawn;
// For resetting all variables and arrays for a retake
function itemReset() {
questionIndex = 0;
keeper = new Array();
correctAnswers = 0;
preventer = 1;
jsAbility = null;
}
// Administer the test and record the answers
function startQuiz(openStatus, whetherOrNot) {
checker = openStatus;
if (whetherOrNot < questionIndex) { busted(); return; }
if (checker) {
spawn = open('','','width=640,height=350,scrollbars=yes');
!checker;
}
if (questionIndex == killers.length) { gradeTest(); return; }
// Separate each array element to form the questions and answr options
var question = killers[questionIndex].substring(0, killers[questionIndex].indexOf('$$'));
var optionA = killers[questionIndex].substring(killers[questionIndex].indexOf('$$') + 2, killers[questionIndex].indexOf('%%'));
var optionB = killers[questionIndex].substring(killers[questionIndex].indexOf('%%') + 2, killers[questionIndex].indexOf('^^'));
var optionC = killers[questionIndex].substring(killers[questionIndex].indexOf('^^') + 2, killers[questionIndex].indexOf('&&'));
var optionD = killers[questionIndex].substring(killers[questionIndex].indexOf('&&') + 2, killers[questionIndex].length);
// Write the questons and answrs options to the new window
spawn.document.clear();
spawn.document.open();
spawn.document.writeln('How much do you know about numbers?');
spawn.document.writeln('');
spawn.document.writeln('');
spawn.document.writeln('Question ' + (questionIndex + 1) + '
');
spawn.document.writeln('');
spawn.document.close();
// Increment variables for the next question
questionIndex++;
preventer++;
}
function gradeTest() {
// Increment the variables for the last time
questionIndex++;
preventer++;
// Compare student answers with correct answers
for (var i = 0; i < killers.length; i++) {
if (keeper[i] == answers[i]) {
correctAnswers++;
}
}
// Determine a ranking according to number of corrrect answers
jsAbility = performance[Math.ceil((correctAnswers/killers.length) * performance.length - 1)];
// Print the test results
printResults();
}
// Print the questions, answer options, and other info
function printResults() {
spawn.document.clear();
spawn.document.open();
spawn.document.writeln('');
spawn.document.writeln('Results');
spawn.document.writeln('');
spawn.document.writeln('');
spawn.document.writeln('You scored ' + correctAnswers + '/' + killers.length + ' correctly.
');
spawn.document.writeln('Ranking: ' + jsAbility + '
');
spawn.document.writeln('
Here is how you scored:
');
for (var i = 0; i < killers.length; i++) {
spawn.document.writeln('\n\nQuestion ' + (i + 1) + '
');
spawn.document.writeln(killers[i].substring(0, killers[i].indexOf('$$')));
spawn.document.writeln('
\na. ' + killers[i].substring((killers[i].indexOf('$$') + 2), killers[i].indexOf('%%')) + '
');
spawn.document.writeln('b. ' + killers[i].substring(killers[i].indexOf('%%') + 2, killers[i].indexOf('^^')) + '
');
spawn.document.writeln('c. ' + killers[i].substring(killers[i].indexOf('^^') + 2, killers[i].indexOf('&&')) + '
');
spawn.document.writeln('d. ' + killers[i].substring(killers[i].indexOf('&&') + 2, killers[i].length) + '
');
// Determine if the student answered each question appropriately, and display accordingly
if (keeper[i] == answers[i]) {
spawn.document.writeln('You answered this correctly.\n
');
}
else { spawn.document.writeln('The correct answer is: ' + answers[i] + '\n
'); }
}
// Add extra info about the ranking, questions, and application
spawn.document.writeln('\n\nYour Ranking
If you came out on top, congratulations! You have a good grasp of numbers and their representation. If not, don\'t worry. Try harder next time! ');
spawn.document.writeln('You can always retake it. ');
spawn.document.writeln('\n\n
Questions About Those Questions?
Some of those were pretty rough, huh? Some even downright unfair? That\'s open for debate, but one thing is ');
spawn.document.writeln('certain: Each answer is documented somewhere in your book or addressed in the lessons. If you have a comment or question, do send me an e-mail or discuss with me in person.');
spawn.document.writeln('\n\n');
spawn.document.close();
}
function busted() {
alert('Sorry, you only get one shot at each question.');
spawn.history.forward();
spawn.focus();
}