How to check dynamically created radio buttons

[foneguy2]

I have several sets of dynamically created radio buttons. Each with a yes,no, and n/a.

<input type="Radio" name="r_1_237" id="r1_1_237" value="yes">Yes<br />
<input type="Radio" name="r_1_237" id="r2_1_237" value="no">No<br />
<input type="Radio" name="r_1_237" id="r3_1_237" value="na">N/A

<input type="Radio" name="r_1_238" id="r1_1_238" value="yes">Yes<br />
<input type="Radio" name="r_1_238" id="r2_1_238" value="no">No<br />
<input type="Radio" name="r_1_238" id="r3_1_238" value="na">N/A

<input type="Radio" name="r_2_239" id="r1_2_239" value="yes">Yes<br />
<input type="Radio" name="r_2_239" id="r2_2_239" value="no">No<br />
<input type="Radio" name="r_2_239" id="r3_2_239" value="na">N/A

The id of the NA radio buttons always start with 'r3_' and the value is always = 'na'.

I need a 'Check All N/A' button that would select all the N/A radio buttons in all the sets of buttons. I am not sure how to reference the buttons if I don't know the exact id.

Thanks

[Nile]

Try this:

<script type="text/javascript">
var checkAll = function(begins){
  for(i=0; (a=document.getElementsByTagName('input')[i]); i++){
    if(a.type == "radio"){
      var id = a.id.substring(0, begins.length);
      if(id == begins){
        a.checked = true;
      }
    }
  }
}
</script>
<a href="javascript:void(0)" onclick="checkAll('r3_');">Check all N/a</a><br />
<input type="Radio" name="r_1_237" id="r1_1_237" value="yes">Yes<br />
<input type="Radio" name="r_1_237" id="r2_1_237" value="no">No<br />
<input type="Radio" name="r_1_237" id="r3_1_237" value="na">N/A

<input type="Radio" name="r_1_238" id="r1_1_238" value="yes">Yes<br />
<input type="Radio" name="r_1_238" id="r2_1_238" value="no">No<br />
<input type="Radio" name="r_1_238" id="r3_1_238" value="na">N/A

<input type="Radio" name="r_2_239" id="r1_2_239" value="yes">Yes<br />
<input type="Radio" name="r_2_239" id="r2_2_239" value="no">No<br />
<input type="Radio" name="r_2_239" id="r3_2_239" value="na">N/A

You can also do this for the other checkboxes, I made this so when you call the function, you type in what the id begins with, and then it finds all of those and checks them.

[foneguy2]

Perfect! Worked like a charm.
THANKS for the quick response too.

[Nile]

Glad to help you! Your welcome!

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