常用代码：
<iframe src=http://www.baidu.com marginwidth=0 marginheight=0 border=0
scrolling=no frameborder=0
width=350 height=270></iframe>
<iframe src=//www.jb51.net/plugins/like.php?href=YOUR_URL
scrolling=no frameborder=0
style=border:none; width:450px; height:80px><
