window.addEvent("domready", function() {
    var scroll = new Fx.Scroll('contentwrap', {duration:1000} );
    
    $('up').addEvent('mousedown', function(){ 
        scroll.toTop();
    } );
    
    $('up').addEvent('mouseup', function(){ 
        scroll.cancel();
    } );
    
    $('down').addEvent('mousedown', function(){ 
        scroll.toBottom();
    } );
    
    $('down').addEvent('mouseup', function(){ 
        scroll.cancel();
    } );
    
    $('contentwrap').addEvent('mousewheel', function(e) {
        var c = $('contentwrap');
        
        c.scrollTo(0, c.getScroll().y-(e.wheel*13) );
    });
});