custom.js

$(function () {
    $("#tabs").tabs();

    if ($('.owl-trusted').length) {
        $('.owl-trusted').owlCarousel({
            loop: true,
            nav: false,
            dots: true,
            items: 4,
            margin: 30,
            autoplay: false,
            smartSpeed: 700,
            autoplayTimeout: 6000,
            responsive: {
                0: {
                    items: 1,
                    margin: 0
                },
                460: {
                    items: 2,
                    margin: 0
                },
                576: {
                    items: 3,
                    margin: 20
                },
                992: {
                    items: 4,
                    margin: 30
                }
            }
        });
    }
    if ($('.owl-testimonials').length) {
        $('.owl-testimonials').owlCarousel({
            loop: true,
            nav: false,
            dots: true,
            items: 1,
            margin: 30,
            autoplay: false,
            smartSpeed: 700,
            autoplayTimeout: 6000,
            responsive: {
                0: {
                    items: 1,
                    margin: 0
                },
                460: {
                    items: 1,
                    margin: 0
                },
                576: {
                    items: 1,
                    margin: 20
                },
                992: {
                    items: 1,
                    margin: 30
                }
            }
        });
    }
});

$(window).scroll(function(){
    $('nav').toggleClass('scrolled', $(this).scrollTop() > 480)
});

// Page loading animation
$(window).on('load', function () {
    if ($('.cover').length) {
        $('.cover').parallax({
            imageSrc: $('.cover').data('image'),
            zIndex: '1'
        });
    }

    $("#preloader").animate({
        'opacity': '0'
    }, 600, function () {
        setTimeout(function () {
            $("#preloader").css("visibility", "hidden").fadeOut();
        }, 300);
    });
});

$(window).scroll(function () {
    var scroll = $(window).scrollTop();
    var box = $('.header-text').height();
    var header = $('header').height();

    if (scroll >= box - header) {
        $("header").addClass("background-header");
    } else {
        $("header").removeClass("background-header");
    }
});