function checkVisible(id){
var top_of_element = $("#"+id).offset().top;
var bottom_of_element = $("#"+id).offset().top + $("#"+id).outerHeight();
var bottom_of_screen = $(window).scrollTop() + $(window).innerHeight()-57;
var top_of_screen = $(window).scrollTop();
if ((bottom_of_screen > top_of_element) && (top_of_screen < bottom_of_element)){
return true;
} else {
return false;
}
}