Interactive rating component

Hey there, but I am pretty noob with the DOM so I typed a looot of lines of code and I am sure I could have done this much smaller concise and understandable if I would know how to create only one function for all the 5 notes instead of create one function for each. So if someone is good enough to explain me, I take it! Everything is working well tho, so don't forget to click on the "5" and submit it :p