getBirthdayFromIdCard : function(idCard) {          var birthday = "";          if(idCard != null && idCard != ""){              if(idCard.length == 15){                  birthday = "19"+idCard.substr(6,6);              } else if(idCard.length == 18){                  birthday = idCard.substr(6,8);              }                        birthday = birthday.replace(/(.{4})(.{2})/,"$1-$2-");          }                    return birthday;        },

// 实例

425125198808083000

// 结果

1988-08-08