<iframe src="http://www.youdao.com" width="500" height="600" ></iframe> 

属性:

frameborder  1 0指定是否有无边框

scrolling:  auto|yes|no   specifies whether or not to display scrollbars in an <iframe>.

 

Use iframe as a Target for a Link

An iframe can be used as the target frame for a link.

The target attribute of a link must refer to the name attribute of the iframe:

<iframe src="demo_iframe.htm" name="iframe_a"></iframe>
<p><a href="http://www.w3schools.com" target="iframe_a">W3Schools.com</a></p>

深入参考:

http://www.javascriptkit.com/jsref/window.shtml