jQuery右下角旋转环状菜单特效的实现

<p class="htmleaf-container">
 <p id=&#39;ss_menu&#39;>
  <p>
  <i class="fa fa-qq"></i>
  </p>
  <p>
  <i class="fa fa-weibo"></i>
  </p>
  <p>
  <i class="fa fa-weixin"></i>
  </p>
  <p>
  <i class="fa fa-renren"></i>
  </p>
  <p class=&#39;menu&#39;>
  <p class=&#39;share&#39; id=&#39;ss_toggle&#39; data-rot=&#39;&#39;>
   <p class=&#39;circle&#39;></p>
   <p class=&#39;bar&#39;></p>
  </p>
  </p>
 </p>
</p>

$(document).ready(function (ev) {
 var toggle = $('#ss_toggle');
 var menu = $('#ss_menu');
 var rot;
 $('#ss_toggle').on('click', function (ev) {
  rot = parseInt($(this).data('rot')) - 180;
  menu.css('transform', 'rotate(' + rot + 'deg)');
  menu.css('webkitTransform', 'rotate(' + rot + 'deg)');
  if (rot / 180 % 2 == 0) {
   toggle.parent().addClass('ss_active');
   toggle.addClass('close');
  } else {
   toggle.parent().removeClass('ss_active');
   toggle.removeClass('close');
  }
  $(this).data('rot', rot);
 });
 menu.on('transitionend webkitTransitionEnd oTransitionEnd', function () {
  if (rot / 180 % 2 == 0) {
   $('#ss_menu p i').addClass('ss_animate');
  } else {
   $('#ss_menu p i').removeClass('ss_animate');
  }
 });
});