Team:NKU CHINA/page js6

jQuery(document).ready(function($){ // browser window scroll (in pixels) after which the "back to top" link is shown var offset = 300, //browser window scroll (in pixels) after which the "back to top" link opacity is reduced offset_opacity = 1200, //duration of the top scrolling animation (in ms) scroll_top_duration = 700, //grab the "back to top" link $back_to_top = $('.cd-top');

//hide or show the "back to top" link $(window).scroll(function(){ ( $(this).scrollTop() > offset ) ? $back_to_top.addClass('cd-is-visible') : $back_to_top.removeClass('cd-is-visible cd-fade-out'); if( $(this).scrollTop() > offset_opacity ) { $back_to_top.addClass('cd-fade-out'); } });

//smooth scroll to top $back_to_top.on('click', function(event){ event.preventDefault(); $('body,html').animate({ scrollTop: 0 , }, scroll_top_duration ); });

});