function isOnScreen(elem)
{
    var $elem = $(elem);
    var $window = $(window);

    var docViewTop = $window.scrollTop();
    var docViewBottom = docViewTop + $window.height();

    var elemTop = $elem.offset().top;
    var elemBottom = elemTop + $elem.height();

    return ((elemBottom <= docViewBottom) && (elemTop >= docViewTop));
}

$(function () {

	$('.menu-call').on("click", function(e){
		e.preventDefault();
		$("nav.main-menu").toggleClass("on");
	});
	
	$('#contactFormSend').on('submit', function(evt){
        evt.preventDefault();

        var k = [ 'name', 'question' ],
            good = true;

        $(this).find('[name]').removeClass('error');
        $(this).find('p.ajaxInfo').hide();


        if ( /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/.test( $(this).find('[name="mail"]').val() ) == false ){
            $(this).find('[name="mail"]').addClass('error');
            good = false;
        }

        for ( var i = 0; i < k.length; i++ ){
            var obj = $(this).find('[name="'+ k[i] +'"]');

            if ( obj.val().length <= 1 ){
                good = false;
                obj.addClass('error');
            }
        }

        if ( good ){
            $.post( $(this).attr('action'), $(this).serialize(), (function(response){
                if (response.indexOf('false') === -1) {
                    $(this).find('input, textarea').val('');
                    $(this).find('p.ajaxInfo.ok').show();
                } else {
                    $(this).find('p.ajaxInfo.error_send').show();
                }
            }).bind(this));
        } else {
            $(this).find('p.ajaxInfo.error').show();
        }
    });
	
	
	var startSlider = $('.start-slider ').owlCarousel({
						items: 1,
						autoplayHoverPause: false,
						autoplay: true,
						autoplayTimeout: 4000,
						animateIn: "fadeIn",
						animateOut: "fadeOut",
						loop: true,
						nav: false,
						dots: false,
						navText: ['<','>']
	}).addClass("owl-carousel");

	$('.start-slider .owl-dots').removeClass("disabled");
	$('.start-slider .owl-nav').removeClass("disabled");
	
	 
	$('.slider-nav .nav-right').click(function() {
		startSlider.trigger('next.owl.carousel');
	})
	$('.slider-nav .nav-left').click(function() {
		startSlider.trigger('prev.owl.carousel');
	})
	
	lightbox.option({
		'resizeDuration': 200,
		'wrapAround': true
	});
	
	$('.carousel').owlCarousel({
		items: 4,
		nav: false,
		dots: false,
		responsive: {
			0: {
				items: 2
			},
			800: {
				items: 3
			},
			1000: {
				items: 4
			}
		}
	}).addClass("owl-carousel");


	$('.grid-item img').each(function() {
		var image = new Image();
		image.src = $(this).attr("src");
		if ( image.naturalHeight > 350) {
			image.height = 300;
			image.width = 200;
		}
	});

});

$(window).load(function(){
	$('.start-slider ul li:first-of-type .btn').append('<i class="fa fa-bus"></i>');
	$('.start-slider ul li:last-of-type .btn').append('<i class="fa fa-ticket"></i>');
});