Swing

HTML

<table border="0"><tbody><tr>

 <td><img class="swing" style="animation-delay: 0.8s; -webkit-animation-delay: 0.8s; -moz-animation-delay: 0.8s;" src="http://gif" alt="" width="230" height="180" /></td>

 <td><img class="swing" style="animation-delay: 0.8s; -webkit-animation-delay: 0.8s; -moz-animation-delay: 0.8s;" src="http://.gif" alt="" width="230" height="180" /></td></tr></tbody></table>

CSS

<style><!--
.swing{
 border-radius: 20px;
 border: 2px dashed #ccc;
 box-shadow: 0 3px 9px #777;
margin:10px 10px 10px 10px;
 -webkit-animation:swinging 10s ease-in-out 0s infinite;
 -moz-animation:swinging 10s ease-in-out 0s infinite;
 animation:swinging 10s ease-in-out 0s infinite;
 -webkit-transform-origin:50% 0;
 -moz-transform-origin:50% 0;
 transform-origin:50% 0;
}

@-webkit-keyframes swinging{
 0% { -webkit-transform: rotate(0); }
 5% { -webkit-transform: rotate(-10deg); }
 25% { -webkit-transform: rotate(6deg); }
 30% { -webkit-transform: rotate(15deg); }
 35% { -webkit-transform: rotate(4deg); }
 40% { -webkit-transform: rotate(13deg); }
 45% { -webkit-transform: rotate(2deg); }
 50% { -webkit-transform: rotate(0); } /* Come to rest at 50%. The rest is just stillness */
 100% { -webkit-transform: rotate(0); }
}

@-moz-keyframes swinging{
 0% { -moz-transform: rotate(0); }
 5% { -moz-transform: rotate(10deg); }
 25% { -moz-transform: rotate(6deg); }
 30% { -moz-transform: rotate(15deg); }
 35% { -moz-transform: rotate(4deg); }
 40% { -moz-transform: rotate(13deg); }
 45% { -moz-transform: rotate(2deg); }
 50% { -moz-transform: rotate(0); } /* Come to rest at 50%. The rest is just stillness */
 100% { -moz-transform: rotate(0); }
}

@keyframes swinging{
 0% { transform: rotate(0); }
 5% { transform: rotate(10deg); }
 
 25% { transform: rotate(6deg); }
 30% { transform: rotate(15deg); }
 35% { transform: rotate(4deg); }
 40% { transform: rotate(13deg); }
 45% { transform: rotate(2deg); }
 50% { transform: rotate(0); } /* Come to rest at 50%. The rest is just stillness */
 100% { transform: rotate(0); }
}
--></style>