$(document).ready(function() {
	$('.img_pre').bind("click",function(){
		$('.img_pre').css('opacity',0.7);
		$(this).css('opacity',1);
		var next_src=$(this).attr('src');
		$('#photos > img.top_gi').stop().animate();
		$('#photos > img.under_gi').attr('src', next_src);
		$('#photos > img.top_gi').animate({opacity: 0.0}, 500, function(){
			$('#photos > img.top_gi').attr('src',next_src);
			$('#photos > img.top_gi').css('opacity',1.0);
		});
	});

});