Sticky header

$(window).scroll(function() {
	var sticky = $('.header,.header-wrap'),
	scroll = $(window).scrollTop();
	(scroll >= 100 ) ? sticky.addClass('fixed') : sticky.removeClass('fixed');
}); 
  
 /*css*/
 .fixed{
    position:fixed;
    background: #BEEB9F;
    /*width: 1024px;*/
    width: 100%;
    z-index: 1001;
    left: 0;
    right: 0;
}