JS Regular Expressions Verify Legal Account Number Mobile Phone Number Telephone Number and Mailbox

Verify that the account is legal

Verification rules: letters, numbers, underscores, letters beginning, 4-16 digits.

function
 checkUser(str){
  var
 re = /^[a-zA-z]\w{3,15}$/;
  if(re.test(str)){
    alert(" Correct ");
  }else{
    alert(" Errors ");
  }     
}
checkUser("jihua_cnblogs");// Call 

Verify the mobile phone number

Validation rule: 11 digits, starting with 1.

function 
 checkMobile(str) {
  var 
 re = /^1\d{10}$/
  if (re.test(str)) {
    alert(" Correct ");
  } else {
    alert(" Errors ");
  }
}
checkMobile('13800138000'); // Call 
checkMobile('139888888889');// Error example 

Verify telephone number

Verification rule: Area code + number, area code beginning with 0, 3 or 4 digits

Numbers consist of 7 or 8 digits

Area code and number can have no connector or "-" connection

Such as 01088888888, 010-8888888, 0955-7777777

function
 checkPhone(str){
  var
 re = /^0\d{2,3}-?\d{7,8}$/;
  if(re.test(str)){
    alert(" Correct ");
  }else{
    alert(" Errors ");
  }
}
checkPhone("09557777777");// Call 

Verify mailbox

Verification rule: Let's just divide the email address into "Part 1 @ Part 2"

Part 1: It consists of letters, numbers, underscores, short lines "-" and dots ".".

Part 2: It is a domain name, which consists of letters, numbers, short line "-" and domain name suffix.

The domain name suffix 1 is generally. xxx or. xxx. xx, and the domain name suffix 1 in Zone 1 is generally 2-4 digits, such as cn, com and net. Now some domain names are larger than 4 digits

function
 checkEmail(str){
  var
 re = /^(\w-*\.*)+@(\w-?)+(\.\w{2,})+$/
  if(re.test(str)){
    alert(" Correct ");
  }else{
    alert(" Errors ");
  }
}
checkEmail("contact@cnblogs.com");// Call 

Above is the site introduced to you JS regular expression to verify the account number, mobile phone number, telephone and mailbox is legal, I hope to help you, if you have any questions welcome to leave me a message, this site will reply to you in time!