$(document).ready(function(){
	
	$(".block").hover(
 	 function () {
		$(this).children(".block-front").stop()
			.animate({ marginTop: "-20px", opacity: 0, zIndex: 99 }, 500 );
 	 }, 
  	function () {
		$(this).children(".block-front").css({'zIndex': '101'});
    	$(this).children(".block-front").stop()
			.animate({ marginTop: "0px", opacity: 1 }, 500 );
  		}
	);
});