$(document).ready(function() {
    var idealWidth = 746;

    $("ul.topNavigation>li>div>span>a").css("padding-left", "0px");
    $("ul.topNavigation>li>div>span>a").css("padding-right", "0px");
    var totalWidth = 0;
    var itemCount = 0;
    $("ul.topNavigation>li").each(function() {
        totalWidth += $(this).width();
        itemCount++;
    });

    totalWidth += 10; //ul padding
    totalWidth += 2; //ul border
    var liMarginTotal = itemCount * 4; //each LI's 4px margin
    totalWidth += liMarginTotal;
    
    var widthDifference = idealWidth - totalWidth;
    var itemPadding = widthDifference / itemCount / 2;
    if (itemPadding > 0) {
        $("ul.topNavigation>li>div>span>a").css("padding-left", itemPadding + "px");
        $("ul.topNavigation>li>div>span>a").css("padding-right", itemPadding + "px");
    };


    
});