$(document).ready(function() {
    //slides the element with class "menu_body" when paragraph with class "menu_head" is clicked
    $('#firstpane p.menu_head').click(function() {
        $(this).css({}).next('div.menu_body').slideToggle(300).siblings('div.menu_body').slideUp('slow');
        $(this).siblings().css({});
    });
});