Radio Button length

[robi2]

Hey, how can i get the length of a radion group?

Assume i have these buttons:

<input type=&quot;radio&quot; name&quot;a&quot;>
<input type=&quot;radio&quot; name&quot;a&quot;>
<input type=&quot;radio&quot; name&quot;a&quot;>
<input type=&quot;radio&quot; name&quot;a&quot;>

And i want to get the length, the number of radios in this radio group, i would do:
window.document.myform.myradio.length

But if i was to access it this way:

window.document.myform.elements[0].length

it will return Undefined.

Suggestions?

Thanks.

 

[jemminger]

in your example, document.myform.elements[0] refers to the very first radio element button. they exist as a group only when you reference them by name.
=========================================================
if (!succeed) try();
-jeff

 

[robi2]

So what your saying is that there is no way to find the length the second way?

 

[jemminger]

you could enumerate the elements of the form, checking the &quot;name&quot; property. count the number of times you encounter the name you're looking for.

a more generic way would be to enumerate the form elements. keep an array of &quot;FormElement&quot; objects...a &quot;FormElement&quot; object would store two properties: name and count. if a FormElement object exists with the name of the current element, increment its count property, else create a new FormElement by that name with a count of 1.
=========================================================
if (!succeed) try();
-jeff

 

[robi2]

Actually i have a better way, well u said it not me.
I just use the name to group them, and still do it in a loop.

var mypath = window.document.myform.elements

mypath[mypath.name].length

And that it.

Thanks alot.