sina微博：
<iframe frameborder="0" allowtransparency="true" marginwidth="0" marginheight="0" scrolling="no" src="http://widget.weibo.com/relationship/followbutton.php?language=zh_cn&width=120&height=24&uid=1756720421&style=2&btn=red&dpc=1"></iframe
QQ空间：
<iframe src="http://open.qzone.qq.com/like?url=http://user.qzone.qq.com/1839458293&type=button_num&width=120&height=24&style=3" allowtransparency="true" scrolling="no" frameborder="0"></iframe>
人人网：
<iframe src="http://www.connect.renren.com/like?url=http://page.renren.com/699049347" scrolling="no" frameborder="0" allowTransparency="true"></iframe>
腾讯微博：
<iframe id="previewmc" src="http://follow.v.t.qq.com/index.php?c=follow&a=quick&name=yanghaonan7758&style=5&t=1336022961842&f=0" frameborder="0" allowtransparency="true" scrolling="no"></iframe>