Latest phone number verify regular expression JS code

Use: Determine the cell phone number in the input box

Input: S: string
(1) The telephone number shall consist of numbers, "(") "and"-"
(2) Phone number is 3 to 8 digits
(3) If the phone number contains an area code, then the area code is three digits or four digits
(4) The area code is separated by "(", ")" or "-" and other parts
(5) Mobile phone number is 11 or 12 digits, if 12 digits, then the first digit is 0
(6) The first and second digits of the 11-digit mobile phone number are "13"
(7) The second and third digits of the 12-digit mobile phone number are "13"
According to these rules, you can go with the following regular expressions:
(^[0-9]{3,4}-[0-9]{3,8}$) | (^[0-9]{3,8}$) | (^ ([0-9]{3,4}) [0-9]{3,8}$] | (^0{0,1}13[0-9]{9}$)
Return: False if return true through validation

The code is as follows	Copy Code
function Istel (s) { var str=s; var reg=/(^[0-9]{3,4}-[0-9]{3,8}$) | (^[0-9]{3,8}$) | (^ ([0-9]{3,4}) [0-9]{3,8}$] | (^0{0,1}13[0-9]{9}$)/; if (Reg.test (str)) { return true; }else{ return false; } }

Later, when I manually tested, I found that like 153,152,187,188 can not pass, and then changed the following:

The code is as follows	Copy Code
var regex = {Mobile:/^0? ( 13[0-9]|15[012356789]|18[0236789]|14[57]) [0-9]{8}$/}

Analysis of Expressions:
"/" represents a regular expression.
"^" represents the starting position of the string, and "$" represents the end position of the string.
“?” Represents a match to the previous character one or 0, so here's 0? The cell phone number can start with 0 or not 0.
The next part of the verification of the 11-bit mobile phone number, starting from 13, since 130-139 have so can be the selection between the [0-9],15 number is not 154 so [] There is no 4 this number, of course, can also be written [0-35-9], the following 18 and 14 open the number ibid.
The parentheses enclose a subexpression that contains 4 optional branches, respectively, with a "|" To distinguish between the "|" in the regular. The priority is the lowest, where each branch matches 3 characters (one [] can only match one character, inside is optional meaning), that is, mobile phone number of the first 3 digits, then there are 8 digits to match, can be 0-9 of any character, so is "[0-9] {8}", {} The number in represents the number of characters that match the preceding character. Analysis completed.