/* http://css-tricks.com/2282-simple-jquery-dropdowns/ */
$(function()
{
    $( "ul.dropdown li" ).hover( function(){    
        $( this ).addClass( "hover" );
        $( "ul:first", this ).css( "visibility", "visible" );    
    },
    function(){
        $( this ).removeClass( "hover" );
        $( "ul:first", this ).css( "visibility", "hidden" );    
    });    
    $( "ul.dropdown li ul li:has(ul)" ).find( "a:first" ).addClass( "dropdownarrow" );
});