Add extra explaining text to HTML_QuickForm

I have a form where I have to punch in a weight and a volume, and I would like the field to be something like this:

Weight (the label) [__________] (the field) kg (the explanation - is that possible.

And I have another field (a date field) where I want to put in some html (a calendar picture) right next to the field. Is that possible without having to us a renderer. Like this:

Date [___] [___] [____] IMG-TAG