How do I programmatically select a radio button?

jgivoni,

The way to select a radiobutton from within JavaScript is by iterating through the array that is created automatically when JavaScript encounters a radiobutton or checkbox type of input.

function setRadio()
{
var rad = document.getElementById(radiobutton);
for (i = 0; i < rad.length; i++)
{
// Perform appropriate test and then use
if (whatever)
{
rad[i].checked = true;
}
}
}

That should check the radio button you're expecting.

I hope this helps,
Ric

Hi Ric,

That works!
Actually I just needed this part:
buttonElement.checked = true

...as I already knew (by Id) which button I wanted to select.

You've answered my question, but I was wondering about your example... it seems to rely on document.getElementById to return an array... Is that correct?

Well, thanks anyway, i'll give you the points.

Jakob

Maybe instead of getElementById() you should use getElementsByName()...