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change form action upon drop down selection

by jsltd / September 16, 2006 8:10 PM PDT

I'm trying to find the best (browser supported) way of changing the action of a form based on the selection of a drop down box.

I've found a script that works in Firefox but not IE:

<SCRIPT LANGUAGE="JavaScript"><!--
function setAction() {
if (navigator.appName.indexOf('Netscape') > -1) {
document.formName.action = document.formName.selectName.options[document.formName.selectName.selectedIndex].value;
return true;
else {
alert('Sorry, your browser does not support the changing of the action property of a form');
return false;


Could this concept work in IE with different javascript ? Or is this the wrong way to go about it.

Any ideas or code snippets appreciated.

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try this?
by slim___shady / September 17, 2006 1:06 AM PDT

i haven't tried it out but take away the if part like so and try it.

<script language="javascript">
function setAction() {
document.formName.action = document.formName.selectName.options[document.formName.selectName.selectedIndex].value;

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hey slim I did it and it works
by jsltd / September 17, 2006 4:44 AM PDT
In reply to: try this?

Doh, why did that script block IE ? Do you think its a security thing ? Is there a vulnerability there related to changing the form action using IE ?

Either way, it works and I wish I was awake enough to see it.

Thanks slim.

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How old was what you found?
by steve749 / September 17, 2006 7:57 AM PDT

There are various browsers out there and sometimes things would work in one browser but not in another. So, some folks would note that to use their site you had to use a specific browser, e.g. this site is best viewed using IE is what some would say while others would favor Netscape as way back when these were your common browsers on Windows machines while others could use Mosaic or Lynx to surf the web.

The concern I'd have is whether or not your script would run on the client system if someone has things really locked down from a security perspective.


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not sure how old, can't find now
by jsltd / September 17, 2006 5:15 PM PDT

Good point, too much of a risk to base a search solution on javascript being enabled. I think I will look at using a server side solution to trapping the results.

Thanks for your thoughts.

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