Would someone PLEASEEE explain!

I am wondering if someone knows where i can find the documentation of the scroll method? I am trying to understand person13.com tutorial on creating
components and the code is not documented properly at all.

http://www.person13.com/articles/components/creatingcomponents.html

This is where i am lost.

setInterval(this._parent,“scroll”,10);

if i understand clearly, the first parameter is the object, the second the function name and the third parameter is the parameter for the function.

but the function defined doesnt take any parameter like that. The articles another format of function calling
setInterval(this._parent,“nudge”,10, 1);

and the defined nudge function takes only one parameter and which is 1.
I dont understand where is the 10 going??? :hair: