$(document).ready( function() {
	$("#sample1 .thumbnail img").click( function() {
		var changeSrc = this.src;
		$("#sample1 .target img").attr("src", changeSrc);
	});

	$("#sample2 .thumbnail img").click( function() {
		var changeSrc = this.src;
		$("#sample2 .target img").fadeOut(
			"slow",
			function() {
				$(this).attr("src", changeSrc);
				$(this).fadeIn();
			}
		);
	});

	$("#sample3 .thumbnail img").click( function() {
		var changeSrc = this.src;
		$("#sample3 .target img").slideUp(
			"slow",
			function() {
				$(this).attr("src", changeSrc);
				$(this).slideDown();
			}
		);
	});
});