Gravity Forms Styling Checkboxes

Oh, click on 'Business Cards' to see the form.

My apologies. I accidentally deleted it out of there. It has been reinserted.

Additionally, I found a different method that works with everything except for gravity forms.

The JS is

jQuery("input[type='checkbox']").each(function() {
    var jQuerythis = jQuery(this);
    jQuerythis.hide();

    var jQueryimage = jQuery("<img src='http://developer.impactpartner.com/albertson/wp-content/uploads/2013/01/checkbox-unchecked.png' class='testbox' />").insertAfter(this);    

    jQueryimage.bind("click", function() {
        var jQuerycheckbox = jQuery(this).prev("input");
        jQuerycheckbox.prop("checked", !jQuerycheckbox.prop("checked"));
        checkImage();
    })

    function checkImage() {
        if(jQueryimage.prev("input[type='checkbox']").prop("checked")) {
            jQueryimage.attr("src", "http://developer.impactpartner.com/albertson/wp-content/uploads/2013/01/checkbox-checked.png");
			jQueryimage.attr("class", "testbox");
        } else {
            jQueryimage.attr("src", "http://developer.impactpartner.com/albertson/wp-content/uploads/2013/01/checkbox-unchecked.png");
			jQueryimage.attr("class", "testbox");
        }
    }

});
});

You will see it working at the bottom of the page with Contact Form 7. I have tried adding the class "testbox" in the CSS Class Name of the checkbox in Gravity Forms but it doesn't seem to work for me.

I embeded a duplicate of the form at the bottom of the page and the check boxes don't seem to work with Gravity Forms.