Referencing array-syntax-like form variable

[Diego Pino]

Hello,

I am experience some problems reading a form variable from a
Javascript function. The point with this particular variable is that
its name has the following syntax:

<input name="tx_impexp[tt_content:159]"/>

I want to set this var to 1 from my javascript function, so I tried
to execute the following line of code:

document.frm_1.tx_impexp[exclude][tt_content:159].value=1;

Unfortunately the following error come up:

Error: missing ] in index expression
document.frm_1.tx_impexp[exclude][tt_content:159].value=1
--------------------------------------------------------------|

It seems Javascript expects to close down the bracket at the position
marked...An easy solution would be to change my var syntax but the
point is that I cannot since I am using an already made script and I
should not modify it.

Just wandering if this is due to a syntax error defined according to
Javascript specification language or there is something wrong with
this. Maybe there is a work-around to get this done. Any help would be
highly appreciated.

Thank you very much!

Diego Pino

[Tom Cole]

On Mar 26, 2:20 pm, "Diego Pino" <[e-mail]:

Hello,

I am experience some problems reading a form variable from a
Javascript function. The point with this particular variable is that
its name has the following syntax:

<input name="tx_impexp[tt_content:159]"/>

I want to set this var to 1 from my javascript function, so I tried
to execute the following line of code:

document.frm_1.tx_impexp[exclude][tt_content:159].value=1;

Unfortunately the following error come up:

Error: missing ] in index expression
document.frm_1.tx_impexp[exclude][tt_content:159].value=1
--------------------------------------------------------------|

It seems Javascript expects to close down the bracket at the position
marked...An easy solution would be to change my var syntax but the
point is that I cannot since I am using an already made script and I
should not modify it.

Just wandering if this is due to a syntax error defined according to
Javascript specification language or there is something wrong with
this. Maybe there is a work-around to get this done. Any help would be
highly appreciated.

Thank you very much!

Diego Pino

You can use document.getElementByName('tx_impexp[tt_content:159]')
[0].value = 1; (or maybe for your example use
document.getElementByName('tx_impexp[tt_content:159]')[exclude].value
= 1;

OR

You can provide an id attribute and find it using that (i.e. using
getElementById('value')) without interfering with the name attribute.

[RobG]

On Mar 27, 5:20 am, "Diego Pino" <[e-mail]:

Hello,

I am experience some problems reading a form variable from a
Javascript function. The point with this particular variable is that
its name has the following syntax:

<input name="tx_impexp[tt_content:159]"/>

I want to set this var to 1 from my javascript function

The group FAQ is a great resource:

"4.25 My element is named myselect[] , how do I access it?"
<URL: http://www.jibbering.com/faq/#FAQ4_25 >
--
Rob

[Diego Pino]

>
You can use document.getElementByName('tx_impexp[tt_content:159]')
[0].value = 1; (or maybe for your example use
document.getElementByName('tx_impexp[tt_content:159]')[exclude].value
= 1;

Sorry, document.getElementsByName('tx_impexp[exclude][tt_content:
159']).value it seems to work, at least no error is raised, but what
is actually happening is that getElementsByName is returning an
undefined value.

>
OR

You can provide an id attribute and find it using that (i.e. using
getElementById('value')) without interfering with the name attribute.

Nice work-around!!! I did it and well, it worked!

Thanks Tom!

[RobG]

On Mar 27, 6:44 am, "Diego Pino" <[e-mail]:

You can use document.getElementByName('tx_impexp[tt_content:159]')
[0].value = 1; (or maybe for your example use
document.getElementByName('tx_impexp[tt_content:159]')[exclude].value
= 1;

Sorry, document.getElementsByName('tx_impexp[exclude][tt_content:
159']).value it seems to work, at least no error is raised, but what
is actually happening is that getElementsByName is returning an
undefined value.

No, it doesn't. It returns a (possibly empty) collection.

<URL: http://www.w3.org/TR/DOM-Level-2-HTM...ml#ID-71555259 >

--
Rob

[Randy Webb]

Tom Cole said the following on 3/26/2007 3:46 PM:

On Mar 26, 2:20 pm, "Diego Pino" <[e-mail]:

>Hello,

I am experience some problems reading a form variable from a
Javascript function. The point with this particular variable is that
its name has the following syntax:

<input name="tx_impexp[tt_content:159]"/>

I want to set this var to 1 from my javascript function, so I tried
to execute the following line of code:

document.frm_1.tx_impexp[exclude][tt_content:159].value=1;

Unfortunately the following error come up:

Error: missing ] in index expression
document.frm_1.tx_impexp[exclude][tt_content:159].value=1
--------------------------------------------------------------|

It seems Javascript expects to close down the bracket at the position
marked...An easy solution would be to change my var syntax but the
point is that I cannot since I am using an already made script and I
should not modify it.

Just wandering if this is due to a syntax error defined according to
Javascript specification language or there is something wrong with
this. Maybe there is a work-around to get this done. Any help would be
highly appreciated.

Thank you very much!

Diego Pino

You can use document.getElementByName('tx_impexp[tt_content:159]')
[0].value = 1; (or maybe for your example use
document.getElementByName('tx_impexp[tt_content:159]')[exclude].value
= 1;

OR

You can provide an id attribute and find it using that (i.e. using
getElementById('value')) without interfering with the name attribute.

OR

You can use a reliable cross browser method that is mentioned in the FAQ
to answer this specific type question. Bracket Notation is your friend
when dealing with form elements.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javascript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/