$(document).ready(function () {

  $(".question").click(function(){
		var curent_object = $(this);
		if ( curent_object.next().is(":hidden") ) {
			curent_object.next().show(0, show_hide_corners());
		} else {
			curent_object.next().hide(0, show_hide_corners())	;
		}
	});
	
	function show_hide_corners(){
		$(".corner").css("visibility", "hidden").css("visibility", "visible");
	}
	
});