function sectionScroll() {
    var section = $('section');
    var down = 0;
    section.bind('DOMMouseScroll', function(e){
        if(e.originalEvent.detail > 0) {
            //scroll down
            if ((down >= 0) && (down < 8))
            {
                down++;
            }
        } else {
            //scroll up
            down--;
            if (down < 0) {
                down = 0;
            }
        }
        //prevent page fom scrolling
        sectionShow(down);
        liActive(down);
        return false;
    });

//IE, Opera, Safari
    section.bind('mousewheel', function(e){
        if(e.originalEvent.wheelDelta < 0) {
            //scroll down
            if ((down >= 0) && (down < 8))
            {
                down++;
            }
           // console.log('Down', down);
        }else {
            //scroll up
            down--;
            if (down < 0) {
                down = 0;
            }
        }
        up = down;
        //prevent page fom scrolling
        sectionShow(down);
        return false;
    });
}
//Firefox