JavaScript Application Cookbook

Chapter 2. The Online Test

Application Features	JavaScript Techniques
• Interactive Multiple Choice Test	• Cheating the SRC Attribute
• Thousands of Unique Tests with One Question Set	• Shuffling and Array Manipulation
• Comprehensive Results Printout and Ranking	• The javascript: Protocol
• Excellent App for Web Surveys and Other Information Gathering	Â
• Context-Sensitive Explanations of Missed Questions	Â

The online test application is a boilerplate for just about any multiple-choice test you’d like to administer over the Web. You have significant flexibility in the following ways:

• You determine the number of test questions the user takes.

• The questions and answers are randomly jumbled each time the application is loaded or the test is retaken, virtually guaranteeing each user a unique test.

• You can add or subtract test questions anywhere in the question set; the application adjusts the shuffling, the administration, the grading, and the ranking.

• You can easily remove the answers from the application to prevent cheating, and forward user answers to the server-side application of your choice for grading.

You can load the application by opening ch02/index.html in your browser. Figure 2.1 shows the opening screen. Now who would have guessed that the test questions included here deal with JavaScript? Try the test. It is a 50-question test that most folks find challenging. Questions cover many JavaScript issues: core JavaScript, client-side and server-side ...