How can I interact with an extension properties page in javascript?

[#1]

In javascript, is it possible to:

• get a reference to the DOM element of an extension properties page?
• change the properties page size?
• show/hide the properties page?
• set a function to be called when an input field value has changed (for example to validate input)?

[#2]

Hi Jeremy,

did you perhaps find a solution for changing the size of the extension property panel?

regards,

Martin