Javascript affecting all tags inside all views

I have a blog controller generated using scaffold with multiple views: index , edit, new, etc.

I have some javascript that adds a class to all div elements:

$('div').each

This function is in a script tag on my index.html.erb page. However it applies the changes to divs across all views in the controller. So when I navigate from index to edit I get the styled divs instead of the plain ones.

How can I limit the function to only work in the index view?