Practical JS Regular Expressions (mobile phone number/IP address Regular Expression/zip code Regular Expression/phone number)

Source: Internet
Author: User

// Check whether it is composed of digits
Copy codeThe Code is as follows:
Function isDigit (s)
{
Var patrn =/^ [0-9] {1, 20} $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Check Logon Name: You can enter only 5-20 strings starting with a letter, which can contain numbers, "_", and ".".
Copy codeThe Code is as follows:
Function isRegisterUserName (s)
{
Var patrn =/^ [a-zA-Z] {1} ([a-zA-Z0-9] | [. _]) {} $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Check user name: only 1-30 strings starting with letters can be entered
Copy codeThe Code is as follows:
Function isTrueName (s)
{
Var patrn =/^ [a-zA-Z] {1, 30} $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Password verification: only 6-20 letters, numbers, and underscores can be entered
Copy codeThe Code is as follows:
Function isPasswd (s)
{
Var patrn =/^ (w) {6, 20} $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Verify the phone number and fax number. The phone number can start with "+" and contain "-" in addition to numbers.
Copy codeThe Code is as follows:
Function isTel (s)
{
// Var patrn =/^ [+] {0, 1} (d) {1, 3} []? ([-]? (D) {1, 12}) + $ /;
Var patrn =/^ [+] {0, 1} (d) {1, 3} []? ([-]? (D) | []) {1, 12}) + $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Verify the mobile phone number. It must start with a number and can contain "-" in addition to a number.
Copy codeThe Code is as follows:
Function isMobil (s)
{
Var patrn =/^ [+] {0, 1} (d) {1, 3} []? ([-]? (D) | []) {1, 12}) + $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Verify the zip code
Copy codeThe Code is as follows:
Function isPostalCode (s)
{
// Var patrn =/^ [a-zA-Z0-9] {3, 12} $ /;
Var patrn =/^ [a-zA-Z0-9] {} $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Verify the search keyword
Copy codeThe Code is as follows:
Function isSearch (s)
{
Var patrn =/^ [^ '~! @ # $ % ^ & * () + = | \] [] {}:; ',. <>/?] {1} [^ '~! @ $ % ^ & () + = | \] [] {}:; ',. <>?] {0, 19} $ /;
If (! Patrn.exe c (s) return false
Return true
}

// Check whether the IP address is used
Copy codeThe Code is as follows:
Function isIP (s) // by zergling
{
Var patrn =/^ [0-9.] {1, 20} $ /;
If (! Patrn.exe c (s) return false
Return true
}

Copy codeThe Code is as follows:
"^ \ D + $" // non-negative integer (positive integer + 0)
"^ [0-9] * [1-9] [0-9] * $" // positive integer
"^ (-\ D +) | (0 +) $" // non-positive integer (negative integer + 0)
"^-[0-9] * [1-9] [0-9] * $" // negative integer
"^ -? \ D + $ "// integer
"^ \ D + (\. \ d + )? $ "// Non-negative floating point number (Positive floating point number + 0)
"^ ([0-9] + \. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] * \. [0-9] +) | ([0-9] * [1-9] [0-9] *) $ "// Positive floating point number
"^ (-\ D + (\. \ d + )?) | (0 + (\. 0 + )?)) $ "// Non-Positive floating point number (negative floating point number + 0)
"^ (-([0-9] + \. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] * \. [0-9] +) | ([0-9] * [1-9] [0-9] *) $ "// negative floating point number
"^ (-? \ D +) (\. \ d + )? $ "// Floating point number
"^ [A-Za-z] + $" // A string consisting of 26 English letters
"^ [A-Z] + $" // a string consisting of 26 uppercase letters
"^ [A-z] + $" // a string consisting of 26 lowercase letters
"^ [A-Za-z0-9] + $" // string consisting of digits and 26 letters
"^ \ W + $" // a string consisting of digits, 26 letters, or underscores
"^ [\ W-] + (\. [\ w-] +) * @ [\ w-] + (\. [\ w-] +) + $ "// email address
"^ [A-zA-z] +: // (\ w + (-\ w + )*)(\. (\ w + (-\ w + )*))*(\? \ S *)? $ "// Url
"^ [A-Za-z0-9 _] * $"

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.