Used with a pair of corresponding lists on http://www.unionindoor.com/locations/.

jQuery add class and show corresponding item on click

var firstlocationli = $('.location li:first').position();

$('.location li').click(function(){
  $(this).addClass('selected');
	$(this).siblings('li').removeClass('selected');
	$(".locations").hide();
	$(".locations#" + $(this).attr("id") + "_list").show();

	var position = $(this).position();

	$('.locations').css('margin-top', position.top - firstlocationli.top + 'px');

})