//menu
$(document).ready(function () {

    $('li.mainlevel').mousemove(function () {
        $(this).find('ul').slideDown("1000"); //you can give it a speed
    });
    $('li.mainlevel').mouseleave(function () {
        $(this).find('ul').slideUp("fast");
    });
    if ($(".side").length > 0) {
        if ($(".side")[0].offsetHeight < $(".main_content")[0].offsetHeight) {
            $(".side").height($(".main_content")[0].offsetHeight);
        }
        else if($(".side")[0].offsetHeight > $(".main_content")[0].offsetHeight) {
            $(".main_content").height($(".side")[0].offsetHeight);
        }
    }
});