$(function(){

  function scroll_screen(target_height)
  {
    $('html,body').animate({ scrollTop: target_height }, 'normal');
  }

  $("section#newopen_main_section nav ul li a").click(function(){
    var target_number = $(this).attr("id").split("_")[3];
    section_top = $("section#newopen_main_section_" + target_number).offset().top;
    scroll_screen(section_top);
    return false;
  });
});