$(document).ready(function() {
        $('.Rundschreiben').css("display", "none");
$('#dropdown0').css("display", "block");
$('.dropdownchange').bind('change', function() {
      selecteddrop=$(this)[0].selectedIndex;
$('.dropdown').css("display", "none");
$('#dropdown' + selecteddrop).css("display", "block");
    });    

$('.level_2').bind('mouseover', function() {
   	$(this).parent().find(".submenu").addClass('active_main');
    });   
$('.level_2').bind('mouseout', function() {
   	$(this).parent().find("a").removeClass('active_main');
    });   

});