Вот их код
var tabBgColor = ['#f13640', '#0096c8', '#89b600', '#9f5200', '#f6a11c', '#a539b5'];
$(window).scroll(function () {
colorOnScroll();
});
colorOnScroll();
function colorOnScroll(){
var scrollTopValue = $(window).scrollTop();
var tabSectionOffsetTop = [];
$.each($(".filet"),function(k,v){
var sectionOffsetTop = $(this).offset().top + ($(this).height() / 2);
tabSectionOffsetTop.push(sectionOffsetTop);
});
if(scrollTopValue<tabSectionOffsetTop[0]){
$('body').stop().animate({ backgroundColor: tabBgColor[0] });
}else{
for(var i=0; i<tabSectionOffsetTop.length;i++){
if(scrollTopValue>tabSectionOffsetTop[i] && scrollTopValue<tabSectionOffsetTop[i+1]){
$('body').stop().animate({ backgroundColor: tabBgColor[i+1] });
}
}
}
}
