What DHTML does WebDialog support?

[draftomatic]

What versions of HTML/JavaScript/CSS does the WebDialog class support? Is this listed anywhere? I'd like to know specific tags if possible.... in particular, what about the <frameset> tag?

[thomthom]

On Windows the webdialog uses the Internet Explorer version that is installed on the user's computer.
On OSX it's webkit.

The webdialog isn't a limited sub-set, but make use of that the OS has available.