Lab Exercise 15: Using some JavaScript functions

For class session on 11/02

Use the Firefox browser.

Be srue to open the Error Console. Clear the console messages if necessary.

The problem

The user wants to calculate the amount to tip in a restaurant. The user will provide both the amount of the bill and the tip percentage to be used.

Requirements

• The percentage and bill amounts will be entered into a form, and the results be shown in a textarea.
• The user should be able to enter the percentage as a whole number - for example a 15% tip should be entered as 15.*
• The report should show the original bill amount, the tip percent, the tip amount, and the total cost.
• The tip and total values should be shown in whole cents.
• The report should be organized into columns as indicated. The exact spacing may vary.

              Bill     Percent      Tip      Total Cost
              $17.95     10%       $1.80      $19.75 

• If the user enters another bill and percent, the new line of results should be added to what is already there.

The Lab 15 Start Page has a basic form already created.

• You need to write the JavaScript event handler for the button.
• You will need to add the initial line with the column headings in the textarea.

Submit your work using Blackboard

Note

*To compute the tip, multiply by the decimal percent. If the entered amount is 15%, you must multiply by 0.15. Your script will have to divide the original value by 100.