You can comment out the below code in file root/templates/Wchd/js/script.js >> http://prntscr.com/556mbb
// add class for mainmenu when scroller
(function(){
var min = null,
sid = null,
mainnav = $('#t3-mainnav'),
navbar = mainnav.find('.navbar:first'),
breakpoint = navbar.length ? navbar.offset().top : 0;
if(mainnav.length){
$(window).scroll(function() {
if(min != $(window).scrollTop() > breakpoint){
min = !min;
min ? mainnav.addClass('affix') : mainnav.removeClass('min-mainnav');
//force reflow
mainnav[0].offsetWidth;
mainnav.prevAll('.hplace').remove();
if(min){
$('<div class="hplace clearfix"></div>').insertBefore(mainnav).css('height', mainnav.outerHeight(true));
mainnav.addClass('min-mainnav');
} else {
mainnav.removeClass('affix');
}
}
})
}
})();