Project #4                                                     Passport (Intermediate)

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Objective

To practice functions, forms, and event handling.

Overview

For this project you will write a guessing number game. The program will generate a random value in a range of values specified by the user, and will process the user guesses. You do not need to provide pseudocode for this project, but you are encourage to develop it for your own benefit.

The following files are associated with this project: Proj4.zip.

Specifications

You must define a form with the text fields and buttons you can see in the Sample Run. The text areas will allow the user to specify the upper and lower limits associated with the range of values from which your program will select a random value. The "PlayGame" button will start the game (your program will choose a random value and start asking the user for guesses). The "ResetValues" button will restore the default values associated with the limits. The following provides additional information regarding the functionality of the program.

• The default values of the lower and upper limits are one and three, respectively.
• The upper and lower limit values can be selected as numbers to be guessed.
• After choosing a random value the program will ask the user for a guess (using the dialog box you see in the Sample Run). If the guess is correct, the program will create a pop-up window with the "congratulations.html" file. Otherwise, the program will ask the user whether he/she wants to continue playing (see Sample Run for the dialog box to use). The program will keep asking the user for guesses as long as the user wants to keep playing. If the user decides to stop playing, the program will display the expected guess and will end.
• You must define and use the following functions:
  1. playGame - This function has no parameters. This function generates the random value, ask the user for guesses, and processes the responses.
  2. getRandomValue - This function has two parameters that represent the lower and upper limits, respectively. The function will return a random value in the specified range. You must use the Math.random() function to compute the random value.
  3. main - You must have a main function whose only task is to associate the "PlayGame" button with the playGame function.

Requirements

• You must name your file p4.html.
• You must use good indentation.
• You must use meaningful variable names.
• You cannot use global variables
• You cannot add functions besides the ones specified above.
• You cannot modify the congratulations.html file.
• Your code must validate according to http://validator.w3.org/#validate-by-upload.

Sample Run

The game video illustrates the functionality associated with the program.

Submission

To submit your project e-mail the p4.html (we do not need the other files) as an attachment in a single e-mail message to cllewis@umd.edu Make sure you write your name on the message you send and that you use as subject "Passport Intermediate Project #4".