$(function() {

  //mobile safari check
  jQuery.extend(jQuery.browser,
    {SafariMobile : navigator.userAgent.toLowerCase().match(/iP(hone|ad)/i) }
  );
 

  



  


  // scroll to section
  $('header nav').delegate('a','click',function(event){
  
  	var $anchor = $(this);
  	var parentTag = $anchor.parent().get(0).tagName;
  	
  	$('header nav a').removeClass('active');
  	
  	if (parentTag != "H1"){
  	 $anchor.addClass('active');
  	}
  	
  	$('html, body').stop().animate({
  		scrollTop: $($anchor.attr('href')).offset().top - -20
  	}, 2500,'easeOutQuad');
  	
  	event.preventDefault();
  });




});