Comparison of regular expressions and dates in JS

From: http://publishblog.blogchina.com/blog/tb. B? Diaryid = 5797645

// Check whether it is composed of digits

Code
Code:

Function isdigit (s) { VaR patrn =/^ [0-9] $ /; 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 ".".

Code
Code:

Function isregisterusername (s) { VaR patrn =/^ [A-Za-Z] ([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

Code
Code:

Function istruename (s) { VaR patrn =/^ [A-Za-Z] $ /; If (! Patrn.exe C (s) return false Return true } }}

// Password verification: only 6-20 letters, numbers, and underscores can be entered
Code:

Function ispasswd (s) { VaR patrn =/^ (\ W) $ /; 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.

Code
Code:

Function istel (s) { // Var patrn =/^ [+] (\ D) []? ([-]? (\ D) + $ /; VaR patrn =/^ [+] (\ D) []? ([-]? (\ D) | []) + $ /; 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.

Code
Code:

Function ismobil (s) { VaR patrn =/^ [+] (\ D) []? ([-]? (\ D) | []) + $ /; If (! Patrn.exe C (s) return false Return true }

// Verify the zip code

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Code:

Function ispostalcode (s) { // Var patrn =/^ [a-zA-Z0-9] $ /; VaR patrn =/^ [a-zA-Z0-9] $ /; If (! Patrn.exe C (s) return false Return true }

// Verify the search keyword

Code
Code:

Function issearch (s) { VaR patrn =/^ [^ '~! @ # $ % ^ & * () + = | \] [\] \:; '\,. <>/?] [^ '~! @ $ % ^ & () + = | \] [\] \:; '\,. <>?] $ /; If (! Patrn.exe C (s) return false Return true } Function isip (s) // By zergling { VaR patrn =/^ [0-9.] $ /; If (! Patrn.exe C (s) return false Return true }

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