Dynamically assign value to hidden fields?

[Brad Melendy]

Hello,
I have a function that among other things, assigns a value to a hidden
field element. However, I want to pass the name of a hidden field to
my function and then assign it a value. So instead of this:

document.forms[0].elements[4].value = "this is a test";

I want to be able to do something like this:

document.forms[0].+MyVarName+.va lue = "this is a test";

Where MyVarName is the name of the field at position 4 in the array of
form elements.

Does anyone know if this is possible? When I try to do this I
generate an error. Thanks for any help!

....Brad

[Vjekoslav Begovic]

Re: Dynamically assign value to hidden fields?

You can do that using eval() function, e.g.

function assignValue(MyV arName){
str = "document.f orms[0]."+MyVarName+". value = 'this is a test'";
eval(str);
}

but you should consider using DOM, something like this

document.getEle mentById(MyVarN ame).value = "test"


"Brad Melendy" <brad@melendy.c om> wrote in message
news:c58e6818.0 307250844.39482 f3@posting.goog le.com...[color=blue]
> Hello,
> I have a function that among other things, assigns a value to a hidden
> field element. However, I want to pass the name of a hidden field to
> my function and then assign it a value. So instead of this:
>
> document.forms[0].elements[4].value = "this is a test";
>
> I want to be able to do something like this:
>
> document.forms[0].+MyVarName+.va lue = "this is a test";
>
> Where MyVarName is the name of the field at position 4 in the array of
> form elements.
>
> Does anyone know if this is possible? When I try to do this I
> generate an error. Thanks for any help!
>
> ...Brad[/color]

[Lasse Reichstein Nielsen]

Re: Dynamically assign value to hidden fields?

"Vjekoslav Begovic" <vjbegovic@inet .hr> writes:
[color=blue]
> You can do that using eval() function, e.g.
>
> function assignValue(MyV arName){
> str = "document.f orms[0]."+MyVarName+". value = 'this is a test'";
> eval(str);
> }[/color]

You *never* need eval to access properties. This can be written
without eval as:
document.forms[0][MyVarName].value = "this is a test";
or even better:
document.forms[0].elements[MyVarName].value = "this is a test";
[color=blue]
> but you should consider using DOM, something like this
>
> document.getEle mentById(MyVarN ame).value = "test"[/color]

"document.forms " is just as legal DOM as "document.getEl ementById".

/L 'please don't top post'
--
Lasse Reichstein Nielsen - lrn@hotpop.com
Art D'HTML: <URL:http://www.infimum.dk/HTML/randomArtSplit. html>
'Faith without judgement merely degrades the spirit divine.'