Some good Js Regular Expression Verification

// Check whether all characters are composed of numbers

Function isDigit (s)

{

Var patrn =/^ [0-9] + $/; // other writing methods var patrn = new RegExp ("^ \ d + $"); return patrn. test (s );

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 ".".

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

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

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.

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.

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

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

Function isSearch (s)

{

Var patrn =/^ [^ '~! @ # $ % ^ & * () + = |\\] [\] \{\}:;' \,. <>/?] {1} [^ '~! @ $ % ^ & () + = |\\]

[\] \{\}:; '\,. <>?] {0, 19} $ /;

If (! Patrn.exe c (s) return false

Return true

}

Function isIP (s) // by zergling

{

Var patrn =/^ [0-9.] {1, 20} $ /;

If (! Patrn.exe c (s) return false

Return true

}

Regular Expression

"^ \ 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 a number, 26 English letters, or underscores

"^ [\ W-] + (\\. [\ w-] +) * @ [\ w-] + (\\. [\ w-] +) + $ "// email address

"^ [A-zA-z] +: // (\ w + (-\ w + )*)(\\. (\ w + (-\ w + )*))*(\\? \ S *)? $ "// Url

"^ [A-Za-z0-9 _] * $"