making a hidden field take the value of a select box

[fiuPikeOY]

Hello,

I need the subject from a mail form to be = to the value selected from a select box. I have the following..

onSubmit( I call the javascript)

javascript...

funcion emailSubject{
document.mailForm.subject.value = document.mailForm.SelectboxName;
}

But it's not working. How do I reference the value from the selectBox. If I say:
document.mailForm.subject.value = "test" it works. I just need to equal it to select Box.

Help?

Thanks

 

[rac2]

if (document.mailForm.SelectboxName.checked) {
   document.mailForm.subject.value = document.mailForm.SelectboxName.value;
}

 

[cLFlaVA]

var f = document.forms['mailForm'];
var sub = f.elements['subject'];
var sel = f.elements['SelectboxName'];
sub.value = sel.options[sel.selectedIndex].value;

*cLFlaVA
----------------------------
[tt]a frickin' twelve-gauge, what do you think?[/tt]
[URL unfurl="true"]http://www.coryarthus.com/[/url]

 

[cLFlaVA]

rac2,

what do you propose would be the value of a select box's "checked" property?

*cLFlaVA
----------------------------
[tt]a frickin' twelve-gauge, what do you think?[/tt]
[URL unfurl="true"]http://www.coryarthus.com/[/url]

 

[fiuPikeOY]

rac2, I tried

document.mailForm.subject.value = document.mailForm.SelectboxName.value;

and it didn't work. Without the "check" issue of course

CLflaVa, can you explain that a bit more. I don't understand it.

Thanks in advance

 

[cLFlaVA]

fiuPikeOY,

Your request can be done in one line, I just broke it down for you so you could see what I was doing:

// get the form object
var f = document.forms['mailForm'];

// get the subject field
var sub = f.elements['subject'];

// get the select box
var sel = f.elements['SelectboxName'];

// make the subject field's value be the select box's value
sub.value = sel.options[sel.selectedIndex].value;

The one-liner would be:

document.forms['mailForm'].elements['subject'].value = document.forms['mailForm'].elements['SelectboxName'].options[document.forms['mailForm'].elements['SelectboxName'].selectedIndex].value;

*cLFlaVA
----------------------------
[tt]a frickin' twelve-gauge, what do you think?[/tt]
[URL unfurl="true"]http://www.coryarthus.com/[/url]

 

[fiuPikeOY]

this worked perfect. Thanks guys. You're awesome

 

[rac2]

Oh boy, what a gaff! I suppose the value would be undefined.

In my defense, I thought maybe the question was regarding a checkbox. I mean 'select box' could be a select element or a checkbox type of input element. Couldnt it?

 

[BillyRayPreachersSon]

I mean 'select box' could be a select element or a checkbox type of input element. Couldnt it?

Not really, no.

Dan


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