腾讯微博点击按钮自动加关注：
<iframe id="previewmc" src="http://follow.v.t.qq.com/index.php?c=follow&a=quick&name=qiuqiu729&style=1&t=1323696990718" width="169" height="75" frameborder="0" scrolling="no" allowtransparency="true"></iframe>
<iframe id="previewmc" src="http://follow.v.t.qq.com/index.php?c=follow&a=quick&name=qiuqiu729&style=1&t=1323696990718" width="169" height="75" frameborder="0" scrolling="no" allowtransparency="true"></iframe>预览效果：
