Trying to get a form to load pages with the previously checked radios already checked (upon a fresh load).

The submissions of that page are held as php variables which I can pass into the javascript, the rest should be simple, but it's not working for me.

My code:

<div class=question>

            <label for=sv_213>Question?</label> 

            <input 

                    class=radio

                    type=radio 

                    value=Yes 

                    name=sv_213 

                />Yes

            <input 

                    class=radio

                    type=radio 

                    value=No 

                    name=sv_213

                />No



        </div>

My javascript:

$(function() {

    var $213 = Yes;

    $(input[name='sv_213'][value=$213]).attr('checked', true);



    });?

In the above js the

var $213 = <dynamically generated content>

Such that it is set equal to the value of the radio button that was checked

Here is a js fiddle with it not working:
http://jsfiddle.net/CW8AC/

Many thanks for any help.

Incidentally my code is based on this, previously asked question:
Set selected radio from radio group with a value