$(document).ready(function() {

    var sidebar_ht = $("#main-sidebar").height();
    var banner_ht = $("#banner").height();

    if ( (sidebar_ht + 35) >= banner_ht) {
        $("#banner").height(sidebar_ht + 30);
        $("#banner-content-container").height(sidebar_ht + 30);
    } else {
        $("#main-sidebar").height(banner_ht - 30);
    }

});