Homework 6 Due 11/30

1) Simple JavaScript Functions (10 pts)

1a) Adding 3 Numbers (5 pts)

Define a function add3 that accepts as arguments 3 numbers as strings and returns the value of the three numbers added together

1b) Find the area of a trapazoind (5 pts)

Define a function trapazoidArea the returns the area of a trapazoid given the length of the two bases and its height

The area of a trapazoid is given by the formula: \( A = \frac{a + b}{2} h \)

2) Finding Standard Devation (20 pts)

2a) Finding the Mean (5 pts)

Define a function mean that returns the average given an array of numbers

2b) Finding the deviations (5 pts)

Define a function deviations that takes two parameters, an array of numbers and the number to caluclate the deviation from

2c) Find the deviation (10 pts)

Define a function stdDev that takes an array of numbers, and calculates the std deviation using the above functions.

The algorithm for finding the standard deviation can be found on the wikipedia page for standard deviation

3) Event Handling (35 pts)

For these two questions, you will add JavaScript to the HTML file provided here.

3a) Find the maximum (20 pts)

In the website the HTML file above generates, there are 5 text boxes and a button. Write an event listner that allows the folowing:

• When the button is clicked, find the largest of the 5 numbers.
• Create a green outline around the box that contains the largest number

3b) Word Counter (15 pts)

In the website that the HTML file above generates, there is also a text area (the large text box). Implement a word count event listener that continously updates the number of words typed in the box and displays the number of words in the HTML element with id wordCount.

4) AJAX (35 pts)

4a) Animal Bingo (20pts)

Write JavaScript in the file AnimalBingo.html that allows the user to click on a radio button to generate an Animal Bingo sheet based on where they are taking a road trip. When radio button is clicked, use AJAX to get the animals to place in the squares. The AJAX request to http://www.csee.umbc.edu/~bwilk1/Animals.php will take one parameter loc that is road trip location. It will return an array of image locations.

4b) Converting Currency (15 pts)

Write JavaScript in the file CurrencyConvertor.html. There is one text box to enter a number that represents the amount in dollars. Use AJAX to convert the amount to the appropriate currency based on the button the user clicks on. The AJAX endpoint is http://www.csee.umbc.edu/~bwilk1/Currency.php and the parameters are amt for the dollar amount, and to that represents the currency to convert to.

Submission

Along with your project, submit a README.txt with instructions on how to run the code and what files will be generated.

   submit cs331_bwilk1 hw6 hw6.js events.html AnimalBingo.html CurrencyConvertor.html