var baseWidth = window.innerWidth;

    if(baseWidth > 767)
    {
        window.onscroll = function (event)
        {

            //Body background, every page
            var y = $(window).scrollTop();
            var one = y/5;
            var three = y/5-400;
            var five = y/5-800;
            var seven = y/5-1200;
            var nine = y/5-1600;

            $('#homepage #one').css('background-position','0px '+one+'px');
            $('#homepage #three').css('background-position','0px '+three+'px');
            $('#homepage #five').css('background-position','0px '+five+'px');
            $('#homepage #seven').css('background-position','0px '+seven+'px');
            $('#homepage #nine').css('background-position','0px '+nine+'px');