var old_expandable = false;
			
$(document).ready(function() {
	 $(".expandable").each(function() {
	 	var expandable = $(this);
	 	var preview = $(".preview", this);
	 	preview.show();
	 	
	 	var content = $(".content", this);
	 	content.hide();
	 	
	 	$(".preview a", this).click(function() {
	 		if (old_expandable) {
	 			$(".preview", old_expandable).show();
	 			$(".content", old_expandable).hide();
	 		}
	 		
	 		preview.hide();
	 		content.fadeIn("slow");
	 		
	 		old_expandable = expandable;
	 	});
	 });
});