newbie MVC question - where should header footer code go?

[eluser]intractve[/eluser]
Javascript can technically go anywhere,

(jQuery plug)
You should check out jQuery (jquery.com)
your code can be written as

Code:

function show_sign_in_box()
{
    $('#sign_in_box').show();    
}

And yes you do not even need to put in in a function to call it.

But this is not really the place for javascript/jquery questions, jquery has its own good community you can check out.