Radio Button Validation - General Function ?

Sep 22, 2011

I'm getting into javascript coding and i'm stumped with some problem about radio buttons. What I would like is to have a general function where I can pass in any group of radio buttons and have it return the textual value of the radio button selected.

First, here is my code so far.

Now here's a sample form:

My question is, when i run this function and pass it in the group of radio buttons by means of the onclick event handler, firefox 3.6.22 reports in the error console on line 22 that "options[index] is undefined". It seems that if i use the variable "index" more than one time it reports this error but if I take out the assignment to variable "choice" that it works just fine.

I rewrote the function using a separate variable and this time it works perfectly:

Notice the indexing variables in the "if" statement and the assignment to "choice" are different.

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I've got 4 radio buttons on an html page.

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named: account_usa | options, Yes & No / 1 & 0

my script:

function checkcurrency(){

var strCan = document.supplier.account_can;
var strUS = document.supplier.account_usa;

if(strCan.value==1 && strUS.value==1){
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return false;
}
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HTML Code:

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HTML Code:

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