Ready Made Javascripts?
 

There are thousands of ready made free javascripts on internet. So, basically will you use one of them or write your own?

If I knew programming, I would write my own because it will look unique from thousands using the ready made script.

Why not do both?
 

Reading other's code is the best way to learn tricks and new ideas, but i always suggest writting your own code, as a programmer of a few languages i truely enjoy when i solve a problem or task i am facing in a more efficient way, or with benefits not commonly used.
For a beginner i would recomend using pre-built scripts to start, but try modifying them to see what they do. :D

Yes, i agree. Write the parts you know how to. And then use the parts you cannot, or something like that.