Getting reference to element with array-like attribute

[laredotornado]

Hi,

I have a number of INPUTs on my page that look like

<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />

How do I refer the last one of these on my page?

Thanks, - Dave

[Tim Williams]

Re: Getting reference to element with array-like attribute

Your question is unclear. If you meant how do you get access to one of the
inputs:

document.getEle mentById("form_ items[][prescription_nu mber]")
or
document.yourFo rmName.elements["form_items[][prescription_nu mber]"]

Tim

"laredotorn ado" <laredotornado@ zipmail.comwrot e in message
news:4d1c144b-9da3-4e23-81e6-5d8db957342f@w3 9g2000prb.googl egroups.com...

Hi,
>
I have a number of INPUTs on my page that look like
>
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
>
How do I refer the last one of these on my page?
>
Thanks, - Dave

[laredotornado@zipmail.com]

Re: Getting reference to element with array-like attribute

On Aug 13, 1:21 am, "Tim Williams" <timjwilliams at gmail dot com>
wrote:

Your question is unclear.  If you meant how do you get access to one ofthe
inputs:
>
document.getEle mentById("form_ items[][prescription_nu mber]")
or
document.yourFo rmName.elements["form_items[][prescription_nu mber]"]
>
Tim
>
"laredotorn ado" <laredotorn...@ zipmail.comwrot e in message
>
news:4d1c144b-9da3-4e23-81e6-5d8db957342f@w3 9g2000prb.googl egroups.com...
>
>
>

Hi,

>

I have a number of INPUTs on my page that look like

>

<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />

>

How do I refer the last one of these on my page?

>

Thanks, - Dave- Hide quoted text -

>
- Show quoted text -

Sorry for the confusion. What I meant to ask is, say I have a form
like this:

<form>
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
</form>

How do I get a reference to the 3rd input field?

Thanks, - Dave

[Tim Williams]

Re: Getting reference to element with array-like attribute

Sorry for the confusion. What I meant to ask is, say I have a form
>like this:

<form>
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
</form>

How do I get a reference to the 3rd input field?

Thanks, - Dave

*Literally* with those id's and names, or are you using
"prescription_n umber" as a placeholder ? If they're literally like that then
you should consider a different naming strategy.

Your example:

document.forms[0].elements[2]
or more generally:
document.forms[0].elements[document.forms[0].elements.lengt h-1]

....assuming that's the first form on the page and there are no other inputs
you're not showing.

Tim

[RobG]

Re: Getting reference to element with array-like attribute

On Aug 14, 1:15 am, "laredotorn...@ zipmail.com"
<laredotorn...@ gmail.comwrote:

On Aug 13, 1:21 am, "Tim Williams" <timjwilliams at gmail dot com>
wrote:
>
>
>

Your question is unclear.  If you meant how do you get access to one of the
inputs:

>

document.getEle mentById("form_ items[][prescription_nu mber]")
or
document.yourFo rmName.elements["form_items[][prescription_nu mber]"]

>

Tim

>

"laredotorn ado" <laredotorn...@ zipmail.comwrot e in message

>

news:4d1c144b-9da3-4e23-81e6-5d8db957342f@w3 9g2000prb.googl egroups.com....

>

Hi,

>

I have a number of INPUTs on my page that look like

>

<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />

>

How do I refer the last one of these on my page?

>

Thanks, - Dave- Hide quoted text -

>

- Show quoted text -

>
Sorry for the confusion.  What I meant to ask is, say I have a form
like this:
>
<form>
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
</form>
>
How do I get a reference to the 3rd input field?

For this specific example:

var name = 'form_items[][prescription_nu mber]';
document.getEle mentsByName(nam e)[2];


You could also do something like:

var form = document.forms[0];
var name = 'form_items[][prescription_nu mber]';
form.elements[name][2];


or more generally, if you want the last one:

var form = document.forms[0];
var name = 'form_items[][prescription_nu mber]';
var inputs = form && form.elements[name];

if (inputs && inputs.length 0) {
var lastInput = inputs[inputs.length - 1];
}


Rather than relying on the form index, it would be better give your
form a name or id and access it using:

var form = document.forms[name];


or

var form = document.getEle mentById(id);


respectively.


--
Rob

[laredotornado@zipmail.com]

Re: Getting reference to element with array-like attribute

On Aug 13, 11:56 pm, RobG <rg...@iinet.ne t.auwrote:

On Aug 14, 1:15 am, "laredotorn...@ zipmail.com"
>
>
>
>
>
<laredotorn...@ gmail.comwrote:

On Aug 13, 1:21 am, "Tim Williams" <timjwilliams at gmail dot com>
wrote:

>

Your question is unclear.  If you meant how do you get access to one of the
inputs:

>

document.getEle mentById("form_ items[][prescription_nu mber]")
or
document.yourFo rmName.elements["form_items[][prescription_nu mber]"]

>

Tim

>

"laredotorn ado" <laredotorn...@ zipmail.comwrot e in message

>

>news:4d1c144 b-9da3-4e23-81e6-5d8db957342f@w3 9g2000prb.googl egroups.com....

>

Hi,

>

I have a number of INPUTs on my page that look like

>

<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />

>

How do I refer the last one of these on my page?

>

Thanks, - Dave- Hide quoted text -

>

- Show quoted text -

>

Sorry for the confusion.  What I meant to ask is, say I have a form
like this:

>

<form>
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
<input id="form_items[][prescription_nu mber]" name="form_item s[]
[prescription_nu mber]" size="15" type="text" value="..." />
</form>

>

How do I get a reference to the 3rd input field?

>
For this specific example:
>
  var name = 'form_items[][prescription_nu mber]';
  document.getEle mentsByName(nam e)[2];
>
You could also do something like:
>
  var form = document.forms[0];
  var name = 'form_items[][prescription_nu mber]';
  form.elements[name][2];
>
or more generally, if you want the last one:
>
  var form   = document.forms[0];
  var name   = 'form_items[][prescription_nu mber]';
  var inputs = form && form.elements[name];
>
  if (inputs && inputs.length 0) {
    var lastInput = inputs[inputs.length - 1];
  }
>
Rather than relying on the form index, it would be better give your
form a name or id and access it using:
>
  var form = document.forms[name];
>
or
>
  var form = document.getEle mentById(id);
>
respectively.
>
--
Rob- Hide quoted text -
>
- Show quoted text -

Thanks, Rob for your detailed suggestions. I ended up going with the
first one. - Dave