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Exercise 40

Create the following folder/file structure:

/ex_40
  |-- index.html

<!DOCTYPE html>
<html>
  <head>
    <title>Events</title>
  </head>
  <body>
    <div></div>
    <button id="firstButton">Click Me!!</button>
    <button id="secondButton">Remove event listener</button>
    <a href="https://google.com">Link with JavaScript handler</a>
  </body>
</html>

index.html

Create a basic HTML document
Create a script tag on the document head element
Select the link element and add a onmouseover event handler
Change the link style (background color) when the user hovers the link element using JavaScript
The background color must be:
- First time: red
- Second time: blue
- Third time: green
- Fourth time: gray
- After four times: white
Add the link element a onmouseout event handler and show the following alert:

The link background color is: %backgroundColor%

index.html