How can I change the ID attribute of the iFrame?  It looks like some default value is being generated by DNN.

Also can I add custom attrbiutes to the iFrame, those that aren't standard html?

It looks like I will have some javascript that needs to reference specific attributes of the iFrame and I want to set everything

up using the standard iFrame module if at all possible.

OK. you can't change the ID of an IFrame, however there are a number of ways to get it - you can get all IFRAME tags on the page and run thru them looking for one where id has an "htmIFrame" string in it:

var iframes_ = document.getElementsByTagName("IFRAME");

for (var if in iframes_)
  if (iframes_[if].id.indexOf("htmIFrame") > 0)
    thisIFrameIsTheOne(iframes_[if]);

As far as adding custom attributes, you can also do it via JavaScript OR just open IFrame.ascx and add them there, if your attributes and values are static