if on certain page display, else display

Hello, first off sorry i am new and a dumbass but I need help with
this.

In my view/application file i have some css and I want a certain bit
of css displayed if a user is in one controller but another type of
css to be display if they are in another controller. I made up the
following which totally doesnt work.

<% if :controller => 'pages', :action => 'index' , :action => 'about'
%>
     <div id='home'></div>

    <% else %>

    <div id='other'></div>

    <% end %>

If you know of a way to make this work so that certain css is
displayed when a user is on the home page and about page, but then the
css changes when they are on any other page I would greatly appreciate
it.

Thanks in advance.

Yeah I guess I can do that, but its just I didn't want to have to
create a new layout just for one simple line of code. But thanks for
the suggestion if I cant find a way to do it I will do it that way.

found the answer if anyone else is looking for it

<% if controller.controller_name == "pages" %>

<div id='home'></div>

    <% else %>

    <div id='other'></div>

    <% end %>