title: add values from two text boxes and put answer in third text box when button is clicked
body: <p>The user enters numbers into textbox labeled A and textbox labeled B. User then clicks a button and the numbers in the two textboxes are added together with the result displayed in textbox labeled C. I have designed the text boxes, labels and button using html but I'm having trouble figuring out the javascript code to do the math. I have just started reading about javascript and I'm confused about the right approach to solve this. Any sample code is appreciated. </p>