custom_select.js

$('body').on('click', '.open_close_sel', function(e){
		var self = $(this);
		popup = self.children('dd'),
		group = self.add(popup);
		
		$('.open_close_sel > dd').filter(function(e){
			return !$(this).is(popup)
			}).removeClass('open').closest('.open_close_sel').removeClass('open');
				
		$(document).off('.custom_select').on('click.custom_select', function(e, f){
			if (f)
				return;
			var elem = $(e.target);
			if (elem.closest('.open_close_sel').length)
				{
				var parent_cont = self.children('dt')
					
				if (elem.is(parent_cont) || elem.is(self) || elem.closest(parent_cont).length)
					{
					group.toggleClass('open');
					}
				else if (!self.is('.multi'))
					group.removeClass('open');
				}
			else 
				{
				group.removeClass('open');
				}
			});