$(document).ready(function()
 {
    $(".menu").next("div").hide();
    $(".menu").click(function() {
        if ($(this).next("div").is(":hidden")) {
            $(".menu").css({
                backgroundImage: "url(../img/general/plus.png)"
            }).next("div:visible").slideUp(500);
            $(this).css({
                backgroundImage: "url(../img/general/minus.png)"
            }).next("div").slideDown(500);
        }
        else {
            $(".menu").css({
                backgroundImage: "url(../img/general/plus.png)"
            }).next("div:visible").slideUp(500);
        }
    });
});