newbie: change values via button

["wilco_nl" <webforumsuser@xxxxxxxxxxxxxx>]

Dear,

 Currently, I'm trying some features of ColdFusion, (8.0.1). I'm a newbee in 
cfform (flash). Please have a look into my code. The text '123' should change 
in '456' by onclick. But, it doesn't.

 Please help me to to fix this or more documentation.

 Thanks a lot,

 Wilco

 <cfform name="test" height="500" width="220" format="flash">
     <cfformitem name="changethis" type="text">123</cfformitem>
     <cfinput name="knop" type="button" value="druk" 
onclick="{test.changethis='456';}" />
   </cfform>