[Moo] help needed

[MJ]

Dear Mailing List,

I have the problem to translate a short script from jquery to
mootools. Can somebody please help and give me a hint? Thank you.
That's the script:

$(document).ready( function() {
        startnavigation();
});

function startnavigation()
{
        $(window).scroll(function(){
                scrolltop = $(window).scrollTop();
                if(scrolltop>= 320)
                {
                        if(!ie6)
                        {
                                $('#navigation').css('position','fixed');
                                $('#navigation').css('top','-60px');
                        }else{
                                $('#navigation').css('top',(scrolltop-330) + 
'px');
                        }
                }else{
                        if(!ie6)
                        {
                                $('#navigation').css('position','relative');
                        }else{
                                $
('#navigation').css('position','absolute');
                        }
                        $('#navigation').css('top','0px');
                }
        });
}


Thanx in advance, manuel