[Dynapi-Dev] One more green

[Jordi - I. - M. <jmi...@or...>]

I'm doing some Mozilla/NS6 bugfixing. So far I've updated CVS with a working
button widget. I guess that's one more green cell.

The bug:

The code checked for unexistant properties this way

if(this.imagelyr==null)

This worked fine untill now but Mozilla returns undefined properties as
'undefined', which is not equal to null. I replaced the condition with
if(!this.imagelyr)