Web Hosting Talk : Web Hosting Main Forums : Programming Discussion : JavaScript help needed

[portalplanet]

Hi all. I have a field in a form called cart_quantity that looks like this:

<input type="hidden" name="id[txt_3]" value="Justin">

after the </form> I am trying to just display an alert with the value of the hidden field like this:

alert(document.forms["cart_quantity"].id[txt_3].value);

This is not working. I'm thinking it's because of the []'s and javascript thinking I'm talking about an array. I have tried this:

alert(document.forms["cart_quantity"].id\[txt_3\].value);

to no avail. Anyone have any suggestions what to try next? I'm customizing osCommerce so I need to keep the []'s in there.

Thanks!
Justin

[GHDpro]

First: if you're not doing it already, you'd might want to use FireFox or Mozilla
for testing, as those browsers have a convinient Javascript console which
will show what has gone wrong.

Without the error message that will probably be in the Javascript console,
it's a bit hard to just guess at what's going wrong, but:

Afaik Javascript arrays do support associative arrays (using strings as index)
but you do need to use quotes if you want to access them:

document.forms["cart_quantity"].id["txt_3"].value

But that's just a guess at what might be the problem...

Btw, instead of:

document.forms["cart_quantity"].

the following should also work (afaik):

document.cart_quantity.

[JimPanse]

i dont understand and have no clue about the strange nametag you using but



<script>
var a = document.getElementsByName("id[txt_3]")[0];
alert(a.value);
</script>


dunno if this will work.....maybe its a try

[portalplanet]

Awesome! Thanks GHDpro! That seems to have fixed my problem.

Justin