The Best of 32s

In the Prototype javascript library, there’s a utility function, $F, which gets value of a form control.  It doesn’t work quite so well for Radio Buttons.

The following code does not work:

<input type="radio" name="myRadio" value="one"/>
<input type="radio" name="myRadio" value="two"/>
<input type="radio" name="myRadio" value="three"/>

<input type="button" onclick="alert($F('myRadio'))"/>

I created another function which gets you the value of the radio button:

function $RF(el) {
   return Form.getInputs($(el).form, 'radio', $(el).name).find(
     function (radioElement) {
      return radioElement.checked;
   }).value;
}

<input type="radio" name="myRadio" value="one"/>
<input type="radio" name="myRadio" value="two"/>
<input type="radio" name="myRadio" value="three"/>

<input type="button" onclick="alert($RF('myRadio'))"/>