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how to change form action value dynamically?Helpful Member!(2) 

navrsalemile (Programmer) (OP)
26 May 06 12:20

I have <html:form method="post" action="javascript:setAction();">

but it doesn't work. setAction() examine 3 radio buttons and is supposed to set action based on the value of the set radio button. What is the correct syntax?

Helpful Member!  mbrooks (Programmer)
26 May 06 12:33
Here's a simple way of doing it.


<script type="text/javascript">
changeAction(url) {
    document.this_form.action = "";

<form method="POST" name="this_form" action="">
<input type="radio" value="" onClick="changeAction(this.value)">

M. Brooks

navrsalemile (Programmer) (OP)
26 May 06 13:21
It doesn't work, I get:

javax.servlet.jsp.JspException: Cannot retrieve mapping for action /


function chgAction( action_name )
        if( action_name=="aaa" ) {
            document.forms[0].action = "/AAA";
        else if( action_name=="bbb" ) {
            document.forms[0].action = "/BBB";
        else if( action_name=="ccc" ) {
            document.forms[0].action = "/CCC";

in the form:

<html:form method="post" action="">

<html:radio property="input" value="aaa" onclick="showAAA();chgAction(this.value);"/>AAA


<html:radio property="input" value="bbb" onclick="showBBB();chgAction(this.value);"/>BBB


<html:radio property="input" value="ccc" onclick="showCCC();chgAction(this.value);"/>CCC

Is there any other way to set action field?
mbrooks (Programmer)
26 May 06 13:23
This work's for me.  The error you are receiving is not related to the javascript.

M. Brooks

navrsalemile (Programmer) (OP)
26 May 06 13:56
Problem was in action="". <html:form> tag requires mapping to be defined and "" is non-existing mapping...
theniteowl (Programmer)
26 May 06 14:13
Standards require there to always be an action defined though some implementations may not enforce it.  It is always a good idea to do so.

It's hard to think outside the box when I'm trapped in a cubicle.

navrsalemile (Programmer) (OP)
29 May 06 21:43
For some reason it doesn't work. The action set in Javascript function as "/AAA" is not recognized as "/context/AAA"!? Other actions which does not use Javascript are recognized correctly
BillyRayPreachersSon (Programmer)
3 Jun 06 5:54

That's probably a server-side thing. If JS is setting the action to what you're telling it, and your JSP is failing, I'd take this to the JSP forum.


Coedit Limited - Delivering standards compliant, accessible web solutions

Dan's Page @ Code Couch

Helpful Member!  tsdragon (Programmer)
3 Jun 06 16:52
You don't, by any chance, have a form FIELD named action do you? I did on a recent project and kept getting an error trying to set the form action, even though I used the correct collection notation to access the form action instead of the shortcut method. Simply renaming the form field solved the problem.

Tracy Dryden

Meddle not in the affairs of dragons,
For you are crunchy, and good with mustard.

sonamchauhan (IS/IT--Management)
12 Jun 06 23:38
I'm not the original form poster but I hit this problem and it's root cause was I had a hidden form input field named 'action'.

<FORM action="does_not_change" ... >
<input type="hidden" name="action" value="edit">

Changing the field name made it possible for me to change the form's action attribute:

<FORM action = "can_be_changed" ... >
<input type="hidden" name="controlAction" value="edit">

Thanks tsdragon - I kept thinking 'action' may be the cause of my problem but kept dismissing it until I came across your post.

tsdragon (Programmer)
15 Jun 06 0:19
You're quite welcome. Thanks for the star. I had exactly the same situation (a hidden form field named "action"). It took me a good half and hour or more of testing, cussing and hair pulling to figure it out. It's nice to know that the time I spent trying to figure that one out not only solved my problem, but saved someone else some trouble too. Isn't Tek-Tips wonderful?

Tracy Dryden

Meddle not in the affairs of dragons,
For you are crunchy, and good with mustard.

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