Using variable to set a textfield value

[el_roachmeister]

Any tips on how to get this to work?

var myvar = 'sometextfield';
document.cost.myvar.value = 2;

It keeps saying myvar is null or not an object even though
'sometextfield' has a value.

[Hywel Jenkins]

In article <11**********************@g49g2000cwa.googlegroups .com>,
el*************@yahoo.com says...

Any tips on how to get this to work?

var myvar = 'sometextfield';
document.cost.myvar.value = 2;

It keeps saying myvar is null or not an object even though
'sometextfield' has a value.

Do you have a form called "cost" and a field element called "myvar"?
Looks to me like you've got it arse about face, going on the code you've
given. To set a form field's value, just do

document.FormName.FieldName.value = jsVariable;

You could also use getElementById, but start with the easy way.

--

Hywel
http://kibo.org.uk/

[RobG]

el*************@yahoo.com wrote:

Any tips on how to get this to work?

var myvar = 'sometextfield';
document.cost.myvar.value = 2;

It keeps saying myvar is null or not an object even though
'sometextfield' has a value.

document.cost[myvar].value = 2;
It's covered in the FAQ:

<URL: http://www.jibbering.com/faq/#FAQ4_39 >
--
Rob

[Hal Rosser]

<el*************@yahoo.com> wrote in message
news:11**********************@g49g2000cwa.googlegr oups.com...

Any tips on how to get this to work?

var myvar = 'sometextfield';

--------------------------------------
Maybe the above line should be:
var myvar = document.formName.sometextfield.value;
Or
var myvar = document.forms[0].sometextfield.value;
(assuming the first form contains your sometextfield)

hth
hr

[Michael Winter]

On 11/12/2005 22:16, el*************@yahoo.com wrote:

Any tips on how to get this to work?

var myvar = 'sometextfield';
document.cost.myvar.value = 2;

See the group FAQ[1], specifically 4.39.

Mike
[1] <http://www.jibbering.com/faq/>

--
Michael Winter
Prefix subject with [News] before replying by e-mail.