当元素获得失去焦点时，触发事件

获得焦点后会触发动画:
<p><input type="text" /> <span>focusout fire</span></p>
<p><input type="password" /> <span>focusout fire</span></p>

$("p").focusin(function() {
$(this).find("span").css('display','inline').fadeOut(1000);
});

失去焦点后会触发动画:
<p><input type="text" /> <span>focusout fire</span></p>
<p><input type="password" /> <span>focusout fire</span></p>

$("p").focusout(function() {
$(this).find("span").css('display','inline').fadeOut(1000);
});