[jQuery] My problem of "addMethod" of Validation plugin

Hi all!

I love Validation plugin, it's pretty cool!

I have a simple form here:

<form name="frmTest" id="frmTest">
<input type="checkbox" name="chk1" id="chk1" />
<input type="text" name="txt1" id="txt1" title="vFalse Validation!!" /
>
<input type="submit" value="submit" name="submit" id="submit" />
</form>

and the js code which is working well:

<script type="text/javascript">
$.validator.addMethod("vFalse", function(value) {
        return false;
});

$().ready(function() {
        $("#frmTest").validate({
                rules: {
                        txt1: {
                                vFalse: {
                                        depends: function(element) {
                                                return $("#chk1").is(":checked")
                                        }
                                }
                        }
                }
        });
});
</script>



And my question is, why this doesn't work:

<script type="text/javascript">
$.validator.addMethod("vFalse", function(value) {
        return false;
});

$().ready(function() {
        $("#frmTest").validate({
                rules: {
                        txt1: {
                                vFalse: "#chk1:checked"
                        }
                }
        });
});
</script>

Thanks for any help!