The objective for today's lab is to investigate Conditional programming.

This program prompts the user for a length and width of the house and then computes the perimeter of the house

1. Create a web page with
   1. 3 text boxes: length, width, and perimeter
   2. a button - "Go!"
   3. div tags with ids that will be used to display the Error messages if an invalid value is entered
2. Create a Javascript function that accepts and validates the length and width of the house
   • Use conditionals to verify the width and if invalid:
     place an appropriate error message in the innerHTML of the corresponding div tag
     Have the error message be in ref font
     and do not calculate the perimeter
   • They both need to be numbers
   • House length cannot be less than 24
   • House length cannot be bigger than 75
   • House width cannot be less than 36
   • House width cannot be bigger than 100
3. Calculate the perimeter: 2*(length_of_house+width_of_house)