How to submit a conditional form with images link?

[Ext-Lydia.Sabino]

Hi all,
 
I am using Struts and I need to implements 3 differents actions for the same form 
(addItem.do, updateItem.do and deleteItem.do).
My form has only 2 fields and 3 images for the actions. Do I have to create 3 
different forms?
Maybe I can use the <html:image> tag but I don't know how.
More, I can't use javascript on my web page though I need to test if the field is 
empty or not!!
Could you help me?
 
Thanks a lot.
LSA.