// This stretches the top nav list items to 100% of the top width.
var mainWidth = $('#topNavInnertube').innerWidth();

liCount = $('li', '#topNavInnertube').length;
    
var liPadding = 0;
$('li', '#topNavInnertube').each(function(){
liPadding += $(this).innerWidth() - $(this).width();
});

var maxWidth = (mainWidth - liPadding) / liCount;
    
$('li', '#topNavInnertube').each(function(i){

$(this).width(maxWidth);
});