Exercise #1 - Put numbers in two text boxes. Click a button to show the results in a dialog box.
jaysCalculator_Example1.php


Exercise #2 - Select 2 numbers in two drop down boxes. The added numbers show up on screen whenever they are changed
jaysCalculator_Example2.php

Exercise #3 - Select a subject (Cars, Fruit, Colors) from a drop down box. When this is selected, change the values in the second drop down box to the appropriate set (Mercedes, Lexus, Infinity) (Apple, Orange, Banana) (Red, White, Blue)