Don't even ask...
Copy and paste into the address bar (IE or FF tested). Copy the prompted value and paste it into Notepad; that's the source code*. Save as polyglot.[com|htm] (ANSI encoding) and run. Note: the 80x86 implementation doesn't wait around, so run it from the command prompt or the window will disappear before you see the output.
Note: The String() value is the actual data that the 80x86 code displays. As a result, you can easily change it to whatever pleases you. (Leave the $ at the end; it's the delimiter for the interrupt that prints the string. Consequentially, you can't print a string containing a $ character.) However, the beginning of the string is hard-coded, so you won't be able to change the HTML before it (for example to add a <title> value)... actually, try it and see what happens (don't make the HTML shorter though...).