js radio点击选中 再点击取消

$(function(){
            $('input:radio').click(function(){
                //alert(this.checked);
                //

                var domName = $(this).attr('name');
               
                var $radio = $(this);
                // if this was previously checked
                
                if ($radio.data('waschecked') == true){
                	 console.log($radio.data('waschecked') == true);
                    $radio.prop('checked', false);
//                     $("input:radio[name='radio" + domName + "']").data('waschecked',false);
                    $radio.data('waschecked', false);
                } else {
                	 console.log($radio.data('waschecked') == true);
                    $radio.prop('checked', true);
//                     $("input:radio[name='radio" + domName + "']").data('waschecked',true);
                    $radio.data('waschecked', true);
                }
            });
        });