====== behavior: button ======
Standard button behavior

===== Elements =====
that have this behavior applied by default (see [[master style sheet]]): 
    *  ''<button></button> '' 
    *  ''<input type="button" />''
    *  ''<widget type="button"></widget>'' 
    *  ''<input type="reset" />'' 
    *  ''<input type="submit" />'' 

===== Attributes =====
that this behavior knows about:
    *  ''value="caption"'' - caption that will appear on the button ((''<button>'' element uses its content as a caption, example: 
<code type="html">
  <button><img src=.../> and some text</botton>
</code>
will be rendered as a button with the image and text inside. ))
===== Events =====
Together with the standard set of events (mouse, keyboard, focus) //behavior: button// generates:
    *  BUTTON_CLICK event - mouse down/up or ''spacebar'' key click when button is in focus. Posted (asynchronous) event
    *  BUTTON_PRESS event - mouse down or ''spacebar'' key down when button is in focus. Synchronous event.