Image-based button like WPushButton?
WImageButton(WImage* normal, WImage* pressed, WImage* disabled=NULL, WImage* rollover=NULL, WWidget* parent=NULL)
That would make it easy to create customized buttons (and they would be rendered in the same way in all browsers, too!)
The "normal" image would be how the button looks like in its normal state
"pressed" is when it is being clicked
"disabled" - after setEnabled(false)
"rollover" - mouse over the button or button is focused
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