Fade In Content when scrolling

fadeInScroll.js

$.fn.fadeInScroll = function(options) {
        $(window).unbind('.checkFades');
        var elements = $(this);
        var settings = $.extend({
            minDistance: 80 * $(window).height() / 100,
            speed:500
        }, options );
        $(elements).each(function(){
            $(this).css({opacity:0});
        });
        var checkFades = function(){
            vWindowScrollTop = $(window).scrollTop();
            $(elements).each(function(){
                if(((vWindowScrollTop + parseInt(settings.minDistance)) >= $(this).offset().top) ){
                    $(this).animate({opacity:1},settings.speed);
                }
            });
        }
        $(window).bind('scroll.checkFades', checkFades);
        $(window).scrollTop($(window).scrollTop()+1);
    };