Пашенька

var searchBtn = document.querySelector('.main-header__button'),
		searchInput = searchBtn.querySelector('.main-header__input'),
		menu = document.querySelector('.main-header__menu');

searchBtn.onclick = function(event) {
			searchInput.classList.add('main-header__input_active')
			searchInput.focus()
			this.classList.add('main-header__button_active')
			menu.classList.add('hidden')
}

searchInput.onblur = function(event) {
  this.classList.remove('main-header__input_active')
  this.parentNode.classList.remove('main-header__button_active')
  menu.classList.remove('hidden')
}

$(document).ready(function(){
  var pos = 0;
    $(document).on('mousewheel DOMMouseScroll', function (e) {
      pos += 1000;
      e.preventDefault();
        $('html, body').animate({
            scrollTop: pos
        }, 1000, function() { });
    });
});

var readMoreBtn = document.querySelector(".js-btn-readmore"),
    readMoreContent = document.querySelector(".js-description-info");

readMoreBtn.addEventListener("click", function(event) {
    event.preventDefault();
    readMoreContent.classList.toggle("js-readmore-show");
    this.textContent = this.textContent === 'Подробнее' ? 'Скрыть' : 'Подробнее';
});

.sub-menu {
  display: none;
}

$('.btn-menu').on('click', function() {
    $('.sub-menu').hide();
    $(this).siblings('.sub-menu').show();
});

.content {
	display: none;
}
#draggable .content {
	display: block;
}

<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
		<?php if ( has_post_thumbnail()) { ?>
		<a class="someclass" href="#">
		<?php the_post_thumbnail('img-responsive'); ?>
		</a>
		<div class="content"><?php the_content();?></div>
	<?php } ?>

$('.someclass').on('click', function(e) {
		e.preventDefault();
		var content = $(this).siblings('.content').clone();
		openbox('draggable');
		$('#draggable').append( content );
	});

$(window).on('load scroll', function () {
		var scrollTop = $(this).scrollTop(),
			h = $(this).height(),
			offset = $('footer').offset().top;
		if (offset - scrollTop > h) {
			//двигаем что нужно
		}
	});