esattamente come fa l' apposito tasto, solo con IE
codice:
<object id="finestra" type="application/x-oleobject" classid="clsid:adb880a6-d8ff-11cf-9377-00aa003b7a11"> 
<param name="Command" value="Minimize"> 
</object>
riduci a icona
<form>
<input type="button" onclick="finestra.Click()" value="riduci a icona" />
</form>
ciao