hidden submit button

[Gogineni, Pratima]

Hi,

This is probably something very straight forward but ...
I am trying to create a hidden submit button with the struts form tags. The
following doesnt seem to work. Does anyone know how to get this to work? 

<html:form action="updateDisplay.do">
Start at row #:
<html:text property="goto" size="3" maxlength="16" onchange="submit()"/>
</html:form>

Ive also tried using a hidden field with property as submit & a hidden field
with property as action

Thanks
Pratima