Submodule 7.3: Word count

The idea!

A textarea accepts text input from the keyboard. We will add a feature to this textarea that provides an approximate word count for the user input.

To do this successfully, you'll need to:

Create your own Javascript file in the "js" directory of the folder "yourNameWEB2JS". You have already created this directory in the exercise of submodule 6.1. Call it "countsTheWords.js".
Add a <script> tag to the page at the bottom that loads your new js file.
In your js file:

Use document.getElementById() to get the textarea element from the page. You'll need its id, which you can find on the HTML page.
Write an event handler function that runs every time someone types in the textarea. It will look something like this:
```
myTextareaElement.onkeyup = function(){
    /* your code goes here*/
}
```
You'll want to access the .value property of the textarea to get the contents of the box as a String
Use string.split() to divide the string (at word boundaries) into an array of Strings
Count the elements in the array. This will be (roughly) the number of words in the box
Write that value into the HTML element that looks like this: <span id="wordcount"></span>