How to Do Addition in JavaScript. Performing JavaScript addition may seem like a simple task, until you discover the number of different ways you can add them.

For example, if you want to count the total number of selected elements in the listbox at any given time, you can do so with the help of some JavaScript code.

Word already displays the number of words in a document in its status bar for all versions. This number appears at the bottom ...

To enable JavaScript, go into the Settings app on your iPhone, click "Safari," then "Advanced," and swipe the JavaScript button to the right so it appears green. Here's a full breakdown with pictures.