[Zope] Forms methods and IE 5.5

Hi, I have tried to use several buttons in the same <FORM>, with the following syntax : <form action="" method="POST"> ... <input type="submit" name="append_item:method" value="Add Item"> <input type="submit" name="index_html:method" value="Show list"></td> </form> This works fine with Konqueror and Netscape, but not with Opera or IE 5.5 : with these browsers, it's the current URL which is called when the second button is clicked. Does anybody knows where this problem comes from ? Is this a standard HTML feature which is not well supported by these browsers ? Is there any way to get this working correctly ??? Thanks for any help... Thierry