Алгоритм позиционирования элементов js

$(document).ready(function(){
	var frame_w, frame_h, centrer1_w, centrer1_h, centrer1_t, centrer1_l, pjax, data, html_loaded, bg_video, mouse_pos, infra_xml, popup_gallery, load_page_js, preloader, param_search_url, menu_frame, menu_btn, menu_content_frame, banks_json;
	var ratio = 0.5625;
	function content_move() {
	    frame_w = $(window).width();
	    frame_h = $(window).height();
	    frame_d = frame_h / frame_w;
	    if (frame_d > ratio) {
	        centrer1_w = frame_h / ratio;
	        centrer1_h = frame_h;
	        centrer1_t = 0;
	        centrer1_l = 0.5 * (frame_w - centrer1_w);
	    } else {
	        centrer1_w = frame_w;
	        centrer1_h = frame_w * ratio;
	        centrer1_t = 0.5 * (frame_h - centrer1_h);
	        centrer1_l = 0;
	    }
	}
	content_move();
	function element_check_size(targ) {
	    targ.css({'width': centrer1_w, 'height': centrer1_h, 'top': centrer1_t, 'left': centrer1_l});
	}

	$(window).on('resize', function() {
        content_move();
    });

	//animations on scroll
	new WOW().init();
	
	$('.header__nav-btn').click(function(e){
		e.preventDefault();
	 	var text = $(this).find('.btn-text').html();
	    $(this).find('.btn-text').html(text == 'меню' ? 'закрыть' : 'меню');
		$(this).toggleClass('active').siblings('.header__nav-menu').toggleClass('active');		
	})

	expand();

	$('.side-panel__open').click(function(e){
		e.preventDefault();
		$(this).removeClass('active').siblings().addClass('active');
		$('.side-panel').addClass('active');
	});

	$('.side-panel__close').click(function(e){
		e.preventDefault();
		$(this).removeClass('active').siblings().addClass('active');
		$('.side-panel').removeClass('active');
	});
	if($('#bg_stage').length > 0) {
		element_check_size($('#bg_stage'));
		$(window).on('resize', function() {
    	    element_check_size($('#bg_stage'));
    	});
	}
});
function expand() {
	val = parseInt($('.house-readiness__percent .value').text(),10);
	perc = val +'%'
	$( ".house-readiness__ready" ).animate({
		height: perc,
	}, 3000);

	$('.house-readiness__percent .value').each(function () {
	    $(this).prop('Counter',0).animate({
	        Counter: $(this).text()
	    }, {
	        duration: 3000,
	        easing: 'swing',
	        step: function (now) {
	            $(this).text(Math.ceil(now));
	        }
	    });
	});
}