JS:
 var s = $("#sticker");
  var pos = s.position();
  $(window).scroll(function(){
    var windowpos = $(window).scrollTop();
    if(windowpos >= pos.top){
      s.addClass("stick");
    }else{
      s.removeClass("stick");
    }
});


CSS:
#sticker{
	width: 100%;
}
.stick{
	position: fixed;
	top: 0px;
	z-index: 999999999;
}