JavaScript Activites

Transcription

1 Note: your work to make sure you have zipped/compressed the files into one folder. Rename the Folder according to your name. [A-Level IT] Instructions: Candidates are required to submit their Ecopy [Electronic Copy] to the Examiner. For this a folder has been created in the Drive [Mr Saem] named as Ecopy. Make sure that your Folder is named according to your Full Name. 1. Write a web page with a javascript to write, Welcome to my very special page with a line break between my and very. [2 Marks] 2. Prompt the user for a number in the range If the number is out of range, display an error message and prompt again until a valid number is entered. Assume the user enters a number each time. [3 Marks] 3. Prompt for an integer, and then display the sum of the integers from 0 through the number entered. For example, if you enter 10, then display 55 which is the sum of [5 Marks] 4. Read two numbers and display their product. [2 Marks] 5. Read two numbers and display their sum. What problem did you encounter?. Write this in a comment. [2 Marks] 6. Read in two numbers and display the larger. [3 Marks] 7. Read in two numbers and display them in ascending order. [3 Marks] 8.. Write a web page that uses the prompt to get the user to input their first name and then their year of birth. Calculate how old they are and write it to the web page (assume everyone was born on the first day of January of this year) [4 Marks] 9. Write a web page that uses a prompt to ask the user what color they d like the background of their paragraphs to be. It should then write a paragraph with the background set to the appropriate color. [6 Marks] 1 P a g e

2 Q10) Create a program that stores the first name, second name and age of a person. Output these in a sentence, for example Saem Mashhud you are 34 years old. [3Marks] Q11) create a program that stores the first name and second name of a person in variables. Combine and output the first two letters of their first name with the first two letters of their second name. [5Marks] Q12) Write a script that will display the word Hi there when you click on the button Show me and hides it when clicked on Hide me. [8Marks] Q13) Create two buttons that will initially let the use enter the numbers, later the second button (Named as Muliply the prompt values) will display the result. [8Marks] Q14) Write a script that will replace an image on the page by some text. Use any image in your computer resize it before you use it to 200x 200. [6Marks] Q15) Try the following with IF and Switch to make it work. Make use of onload in the body event or through a button to make it work. Use SwitchInnerHTML file. 2 P a g e

3 case "1": No. OCR is for recognizing Optical Characters case "2": Yes Optical Mark Recognition is correct case "3": No MICR is for recognizing Magnetic Ink Characters default: Unknown choice Q16 ) Create a program that produces the result as below. Q17 ) a ) Create a program that would do the following. Q18) Your task is to create a FOR LOOP that output the numbers with line breaks between each number. 3 P a g e

4 Q19) Q20) Here is the assignment for the file calculation. Write out the contents of a file pizza.html that would run a JavaScript script that prompts the user to enter the size of a pizza (the diameter) and the price of a pizza, and calculates the price per square inch. Use Math.PI as the constant π The formula for radius is: radius = diameter / 2; The formula for area of a pizza (um, I mean circle), is: area = πr 2 Hint: [var area = Math.PI * radius * radius;] You can calculate radius squared in JavaScript with radius * radius Include an HTML comment near the top of the file that includes the file name, your name, the date, and the assignment (activity 3 for A-Level IT ). Be sure all your tags follow the HTML standard: i.e. they should be all closed, properly nested, and written with lowercase letters. 4 P a g e

5 Q21) This time we are going to see how to get input from the user and combine that with the other two, to create a simple page that can great you. [3 Marks] Q22) Write a JavaScript program to calculate multiplication and division of two numbers (input from user). Sample Form: [4 Marks] Q23 [6 Marks] Q24 [7 Marks] 5 P a g e

6 [Q25] [15 Marks] Simple sales app: Your web site sells bags of coffee for the Save the Aardvarks Foundation. You sell regular coffee at $9/bag, you sell decaffeinated coffee at $8/bag, and you sell mocha coffee for $11/bag. If the user buys more than $100 worth, they get a $15 discount. Use the prompt to ask the user how many bags of regular coffee s/he wants. Then use the prompt to ask about decaf, and then about mocha. Using the input, calculate the total amount the user will pay. If the total is over $100, subtract $15 from their total. Write out their receipt to the web page, by writing out how many bags of regular they purchased and how much that works out to, then how many bags of decaf and how much that works out to, and then how many bags of mocha they purchased and how much that works out to. Finally write out how much the total will be. So, for example, after running the script, the web page might look like this: You purchased 3 bags of regular, totaling 27 dollars. You purchased 2 bags of decaf, totaling 16 dollars. You purchased 6 bags of mocha, totaling 66 dollars. Your total purchase cost is 93 dollars 6 P a g e