$(function(){
    
    // space the navigation elements.
    var navigation = $('nav');
    var nav_width = navigation.width();
    var nav_items = navigation.find('a');
    
    var nav_item_width = nav_width / nav_items.length - (nav_items.length - 1);
    nav_items.last().css('border','none');
    
    nav_items.each(function(){
       $(this).innerWidth(nav_item_width);
    });
    
});