【正则】手机号中间四位显示*

function checkNumber(theObj) {
                var reg = /^[0-9]+\.?[0-9]*$/;
                if (reg.test(theObj)) {
                    return true;
                }
                return false;
            }

 

newPhone= phone.replace(/^(\d{3})\d{4}(\d+)/,"$1****$2");

 

结果：

138****0157