Python post form with button javascript -

i try post ads in website.
have 2 forms ,the first form ask me information of ads , ok submit them in second form, submit have button (input) javacript,

onclick="action_cmd('delete')" 

i use mechanize , python .

the code javascript :

function action_cmd(action){ var hidden = document.getelementbyid("div_cmd"); hidden.innerhtml += "<>input type=\"hidden\" name=\"cmd\" value=\"" + action + "\">"; document.form_ads_action.submit(); } 

the code python :
first form add information.

br.open("link") br.select_form(nr=0) br.submit() 

is ok first.

for second form:

br.select_form(nr=0) br.submit() 

doesn't work.

the code html :

form name="ads_action" action="link" method="post" enctype="multipart/form-data"> input type="image" name="back" id="back" value="back"   onclick="action_cmd('back');"> input type="image" name="continue" id="continue" value="val"onclick="action_cmd('delete')"> 

pls me

you have same form number:

br.select_form(nr=0) br.submit() 

if it's different form on same page, should be:

br.select_form(nr=1) br.submit() 

or if want select second form, can name:

br.select_form(name = "ads_action") br.submit()