All browsers will support the <object> element.
The <object> element is used to define an embedded object inside an HTML document.
It is utilised for embedding plug-ins (like Java applets, PDF readers, Flash Players) in various web pages.
Example
<object width="400" height="50" data="bookmark.swf"></object>
The <object> element is also used for including HTML in HTML:
Example
<object width="100%" height="500px" data="snippet.html"></object>