Common JS judgment

Common JS judgment

 

About registration; judgment on registration information:

 

Form

<Form ID = "form" name = "form" method = "Post" Action = "" onsubmit = "Return Checkpost ();">

Introduction: <script language = "JavaScript" src = "Js. js">

</SCRIPT>

 

The following is a judgment on the length of the input value.

<Script language = "JavaScript">

 

Function Checkpost ()

{

If (document. Form. username. value = ""

| Document. Form. passwd. value = "")

{

Alert ("each item needs to be filled in! ");

 

Return false;

}

 

If (document. Form. username. value. length> 5 ){

Alert ("the User Name Length cannot exceed five characters ");

Return false;

}

 

}

</SCRIPT>

 

Page jump to new page

 

<SCRIPT> window. Location = "index. php"; </SCRIPT>;

 

Tip: Close the window. How can I return to the home page after a new page is opened?

 

<A href = "index. php" onclick = "javascript: window. Close ();" Title = "back"> back to home >></A>

 

 

 

/Determine control visibility

Function iscontrolvisible (handle ){

VaR retvalue = true;

While (handle. tagname. tolowercase ()! = 'Form' & handle. style. display. tolowercase ()! = 'None '){

Handle = handle. parentelement;

}

If (handle. style. Display = 'None') retvalue = false;

Return retvalue;

}

 

// ============================== The above is the system function area ====================== ======== //

 

// The following is an instant verification function for input content during the input process.

// The value must be a number.

Function inputnumber (handle, keycode ){

If (! (Keycode >=48 & keycode <= 57) | (keycode >=96 & keycode <= 105 ))){

Window. event. returnvalue = false;

Return/"a number is required! That is, the following characters:

1234567890 /";

} Else return true;

}

 

// A letter is required

Function inputletter (handle, keycode ){

If (! (Keycode> = 97 & keycode <= 122) | (keycode> = 65 & keycode <= 90 ))){

Window. event. returnvalue = false;

Return/"uppercase/lowercase letters are required! That is, the following characters:

Abcdefghijklmnopqrstuvwxyz

Abcdefghijklmnopqrstuvwxyz /";

} Else return true;

}

 

// All visible characters must be entered

Function inputvisible (handle, keycode ){

VaR pattern =/"abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789. @> <,-[] {}? /+ = | //////'///":;~! # $ % ()'/";

VaR keyValue = string. fromcharcode (keycode );

If (keycode = 190) keyValue = /"./";

If (keycode = 189) keyValue = /"-/";

If (keycode = 188) keyValue =/"</";

If (keycode = 219) keyValue = /"/";

If (keycode = 191) keyValue = /"? /";

If (keycode = 187) keyValue =/"+ /";

If (keycode = 220) keyValue =/"| /";

If (keycode = 222) keyValue = /"'/";

If (keycode = 186) keyValue = /";/";

If (keycode = 192) keyValue = /"~ /";

If (pattern. indexof (keyValue )! =-1 ){

Window. event. returnvalue = true;

Return true;

} Else {

Window. event. returnvalue = false;

Return/"visible characters must be entered! That is, the following characters:

Abcdefghijklmnopqrstuvwxyz

Abcdefghijklmnopqrstuvwxyz

0123456789. @> <,-[] {}? /+ = | //////'///":

;~! # $ % ()'/";

}

}

// You must enter letters and numbers.

Function inputnormal (handle, keycode ){

VaR pattern =/"abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789 /";

VaR keyValue = string. fromcharcode (keycode );

If (pattern. indexof (keyValue )! =-1 ){

Window. event. returnvalue = true;

Return true;

} Else {

Window. event. returnvalue = false;

Return/"visible characters must be entered! That is, the following characters:

Abcdefghijklmnopqrstuvwxyz

Abcdefghijklmnopqrstuvwxyz

0123456789 /";

}

}

 

// ========================== The following is the verification function area ====================== ======== //

// Function Name Description: Is + typename. The first letter of typename is capitalized.

// The handle parameter is the current control handle.

// The keycode parameter is the value of the current button.

// Return Description: the reason for failing to return /"/"

/* Format supports example tables

Format description

Number Type

Userid

Username

Enterprisename Enterprise Name

Loginname

CardNumber ID number

Address

Phone number

Mobile phone number

Postcode zip code

Email

Name simplicity

Password

Namestr name string

Descstr description string

Pageurl page url

Dirctory disk path

*/

 

// Determine whether the unit ID is correct

Function isorganizationid (handle ){

VaR pattern =/^ (// d) {16, 16} $ /;

If (! Pattern.exe C (handle. Value )){

Handle. value =''

Return/"a 16-digit number is required! /";}

Return true;

}

 

// Determine whether it is a number

Function isnumber (handle ){

VaR pattern =/^ (// d) {1, 16} $ /;

If (! Pattern.exe C (handle. Value )){

Handle. value =''

Return/"a number is required! /";}

Return true;

}

 

// Determine whether the account is a user account

Function isuserid (handle ){

VaR pattern =/^ (// d | // W) {3, 14} $ /;

If (! Pattern.exe C (handle. Value) return/"a number is required.

And the length must be greater than or equal to 3 and less than or equal to 14! /";

Return true;

}

 

// Determine whether the user name can be a letter or a Chinese character

Function isusername (handle ){

VaR pattern =/^ {2, 50} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a Chinese letter or number

The length must be greater than or equal to 2 and less than or equal to 50! /"

Return true;

}

 

// Determine whether it is a name: It can be letters, numbers, Chinese characters -_

Function isname (handle ){

VaR pattern =/^ {1, 30} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a Chinese letter or number! /";

Return true;

}

 

 

// Determine whether the menu name is used: it can be a letter, digit, Chinese character -_

Function ismenuname (handle ){

VaR pattern =/^ {2,200} $ /;

If (! Pattern.exe C (handle. Value) {return/"must be a Chinese letter or number

The length must be greater than or equal to 2 and less than or equal to 40! /";

Handle. value =''

} Return true;

}

 

// Determine whether the logon name is used

Function isloginname (handle ){

VaR pattern =/^ (|) {2, 25} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a letter or number

And the length must be greater than or equal to 2 and less than or equal to 25! /";

Return true;

}

 

// Determine whether the ID card number is used

Function iscardnumber (handle ){

VaR pattern;

Pattern =/^ (// d) {5, 18} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a number

The length must be greater than or equal to 5 Characters and less than or equal to 16 characters! /";

Return true;

}

 

// Address

Function isaddress (handle ){

VaR pattern =/^ {2,200} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a Chinese letter or number

The length must be greater than or equal to 2 and less than or equal to 200 characters! /";

Return true;

}

 

// Determine whether the phone number is correct

Function isphone (handle ){

VaR pattern =/^ (// d) {6, 30} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a number

The length must be greater than or equal to 6 Characters and less than or equal to 30 characters! /";

Return true;

}

 

// Determine whether the zip code meets the requirements

Function ispostcode (handle ){

VaR pattern =/^ (// d) {6} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a number

The length must be 6 characters! /";

Return true;

}

 

// Determine whether the email format is correct

Function isemail (handle ){

VaR pattern =/^ () + @ () + (//.) + /;

If (! Pattern.exe C (handle. Value) return/"must comply with the email address format /";

Return true;

}

 

// Simple search

Function isnamesimplicity (handle ){

VaR pattern =/^ () {2, 25} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a letter

And the length must be greater than or equal to 2 and less than or equal to 25! /";

Return true;

}

 

// Determine whether the entered password is correct

Function ispassword (handle ){

VaR pattern =/^ (|) {2, 25} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a letter or number

And the length must be greater than or equal to 2 and less than or equal to 25! /";

Return true;

}

 

// Determine whether it is a description: it can be a letter, number, Chinese character -_,.

Function isdescstr (handle ){

VaR pattern =/^ {1, 50} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a Chinese letter or number

And the length must be greater than or equal to 1 and less than or equal to 50! /";

Return true;

}

 

// Determine whether the page url is correct

Function ispageurl (handle ){

VaR pattern =/^ +/. + [// = //? % //-&_~ '@/': +!] * () * $ /;

If (! Pattern.exe C (handle. Value )){

Return/"enter the correct URL format, such as A. do? B = 1 & C = 2 /";

Handle. value =''

}

Return true;

}

 

// Determine whether the version number is correct (the first is a number followed by A. Or number)

Function isversion (handle ){

VaR pattern =/^ // d {1} + * $ /;

If (! Pattern.exe C (handle. Value )){

Return/"enter the correct version format, such as 1.234 /";

Handle. value =''

}

Return true;

}

 

// Determine whether the system ID is correct (the System ID can only be a combination of numbers and letters)

Function issysid (handle ){

VaR pattern =/^ // W {1, 10} $ /;

If (! Pattern.exe C (handle. Value )){

Return/"must be a letter or number

And the length must be greater than or equal to 1 and less than or equal to 10! /";

Handle. value =''

}

Return true;

}

 

 

// Determine whether the directory path is correct

Function isdirctoryurl (handle ){

VaR pattern =/^ {1,300} $ /;

If (! Pattern.exe C (handle. Value) return/"must be a Chinese letter or number

The length must be greater than or equal to 1 and less than or equal to 300 characters! /";

Return true;

}