[jQuery] can i call ready function more than one time in a html page

Hi to jQuery Guys,
I am new to jquery. i have few probs with jquery.
1. I want to know can we execute ready function twice in a html page?
If we execute, does it affect the functionality of ready function.
2. I have one main js file that's included in each page and after this
i want to include js file specific to each pages.
And i also want to write ready function in specific pages. is it
okay?