Having - finally! - finished this, I thought I'd post my code. I'm very sure it could be more compact, but I'm a bit of a Javascript dork and thought others might benefit from my step-by-step approach ;)
// menu show/hide $( '#themenu' ).children( 'li[id]' ).hover( function() { var theID = $( this ).attr( 'id' ); var theSiblings = $( this ).siblings() ; // second level var theList = "#" + theID + " ul:first" ; $( theList ).slideToggle( 'slow' ); $( theSiblings ).children( 'ul' ).hide() ; // third level var theSub = $( theList ).children( 'li' ) ; $( theSub ).hover( function() { var theSubSibs = $( this ).siblings() ; $( this ).children( 'ul' ).fadeIn( 'slow' ) ; $( theSubSibs ).children( 'ul' ).fadeOut( 'fast' ) ; }); }, function() { $( this ).children( 'ul' ).hide( 'slow' ) ; }); Cherry.