window.addEvent('domready', function() {
    $('left').addEvent('mouseover',function() {$('left').setStyle("background-position", "0 -75px");});
    $('left').addEvent('mouseout',function() {$('left').setStyle("background-position", "0 0");});

    $('right').addEvent('mouseover',function() {$('right').setStyle("background-position", "0 -75px");});
    $('right').addEvent('mouseout',function() {$('right').setStyle("background-position", "0 0");});

    $('left').addEvent('click',function() {
        x = $('top-videos-list').style.left.toInt();
        if (x == "" || isNaN(x)) {x = 0;}
        if (x < 450) {
            $('top-videos-list').effect('left',{duration: 400, transition: Fx.Transitions.Back.easeInOut, wait:true }).start(x, x + 540);
        }
    });

    $('right').addEvent('click',function() {
        x = $('top-videos-list').style.left.toInt();
        if (x == "" || isNaN(x)) {x = 0;}

        var cont = 0;
        $('top-videos-list').getChildren().each(function(li) {cont++;})
        var desp = (cont - 1) * 540;

        if ((x + desp) > 0) {
            $('top-videos-list').effect('left',{duration: 400, transition: Fx.Transitions.Back.easeInOut, wait:true }).start(x, x - 540)
        }
    });
})