Image manipulation

Exercise

1. Open your editor, create a new file and save it as exersice10.3.html in the folder "exercises". Copy this code and paste it into the file. Save the file.
2. Create a new file and save it as 10.3.js in the folder "js/ exercises". Copy this code and paste it into the file. Save the file. You may need to create the js folder (if it's not already there)
3. Open the html file in your Firefox. Is everything ok?