[jQuery] [validate]

Hello,
is there any one who has experience on mac (both safari and FF) this
bug. none of rules are working:
        rules: {
            secondSentDocumentsTo: {
//                required: "#aTextArea:filled"
                required: function() { return $("#aTextArea").is(":filled") ?
true: false; },
            }
        }
Thanks
Mesut TUNGA