[RESOLVED] Radio Button Loop, help me understand?

[Insyderznf]

I'm not quite understanding how to loop a large amount of radio buttons to become checked or not. I could probably copy paste some code but I really want to understand this.

So on my document I have a large amount of radio buttons. Such as:

<table style="width: 100&#37;" Name="Test1">
		<tr>
			<td><a href="#" onclick="test()">Yes</a></td>
			<td>No</td>
			<td>DK</td>
		</tr>
		<tr>
			<td><input type="radio" name="Radio1" value="Yes" id="rYes1" /></td>
			<td><input type="radio" name="Radio1" value="No" id="rNo1"/></td>
			<td><input type="radio" name="Radio1" value="DK" id="rDK1"/></td>
		</tr>
		<tr>
			<td><input type="radio" name="Radio2" value="Yes" id="rYes2" /></td>
			<td><input type="radio" name="Radio2" value="No" id="rNo2"/></td>
			<td><input type="radio" name="Radio2" value="DK" id="rDK2"/></td>
		</tr>

....	

</table>

So to select a single button I can do:
document.testform1.elements.rNo1.checked=true;

It seems like I should be able to create a loop that says:
var i=1;
while (i<=20)
{
document.testform1.elements.rNo[i].checked=true;
i++;
}

This does not work and I'm pretty sure it is because I am not understanding
document.testform1.elements.rNo[i].checked=true;
Normally this would be an array but looking at other code i have no idea what this is saying in javascript.
Any help would be appreciated! Thank You!

[JMRKER]

Can you try? ...

var i=1;
while (i<=20) {
  document.getElementById('rNo'+i).checked = true;
  i++;
}

[Insyderznf]

I'll see what happens when I try that. Thanks!

[Insyderznf]

That works, the getElementById allows for this functionality it seems while doing it by document.(formname).elements does not. Thank you!

[JMRKER]

You're most welcome.
Happy to help.
Good Luck!