Forcing a tab stop on a hidden element? Possible?

Question

The site is here

I have opt to using the radiobutton's labels as customized buttons for them. This means the radio inputs themselves are display:none. Because of this, the browsers don't tab stop at the radio labels, but I want them to.

I tried forcing a tabindex to them, but no cigar.

I have came up with just putting a pointless checkbox right before the labels, and set it to width: 1px; and height 1px; which seems to only really work on chrome & safari.

So do you have any other ideas for forcing a tab stop at those locations without showing an element?

Edit:

Just incase someone else comes by this, this is how I was able to insert small checkboxes into chrome & safari using JQuery:

if ($.browser.safari) {
    $("label[for='Unlimited']").parent().after('<input style="height:1px; width:1px;" type="checkbox">');
    $("label[for='cash']").parent().after('<input style="height:1px; width:1px;" type="checkbox">');
    $("label[for='Length12']").parent().after('<input style="height:1px; width:1px;" type="checkbox">');
}

Note: $.browser.webkit was not becoming true...so I had to use safari

Answer 1

Keep the radio input hidden, but set tabindex="0" on the <label> element of reach radio input.

(A tab index of 0 keeps the element in tab flow with other elements with an unspecified tab index which are still tabbable.)