Regular Expressions - verification phone number

function CheckPhoneNumber(){

　　// 1 [345678] \ d {9} at the beginning of the digital number is a 1 + 3-8 + behind any number 9 digits

　　if(!(/^1[345678]\d{9}$/.test(phone))){

　　Alert ( "phone number verification failed");

　　return false;

　　}

}