Js verification form Overview

Good JS verification ~~~~~~~~~~~~~~~~~~~~~~~~~
Purpose: Verify the IP address format.
Input: strIP: IP Address
Return: If the verification succeeds, true is returned; otherwise, false is returned;

*/
Function isIP (strIP ){
If (isNull (strIP) return false;
Var re =/^ (\ d + )\. (\ d + )\. (\ d + )\. (\ d +) $/g // Regular Expression matching IP addresses
If (re. test (strIP ))
{
If (RegExp. $1 <256 & RegExp. $2 <256 & RegExp. $3 <256 & RegExp. $4 <256) return true;
}
Return false;
}

/*
Purpose: Check whether the input string is null or all are spaces.
Input: str
Return Value:
If all values are null, true is returned. Otherwise, false is returned.
*/
Function isNull (str ){
If (str = "") return true;
Var regu = "^ [] + $ ";
Var re = new RegExp (regu );
Return re. test (str );
}


/*
Purpose: Check whether the value of the input object conforms to the integer format.
Input: str string
Return: If the verification succeeds, true is returned; otherwise, false is returned.

*/
Function isInteger (str ){
Var regu =/^ [-] {0, 1} [0-9] {1,} $ /;
Return regu. test (str );
}

/*
Purpose: Check whether the entered mobile phone number is correct.
Input:
S: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function checkMobile (s ){
Var regu =/^ [1] [3] [0-9] {9} $ /;
Var re = new RegExp (regu );
If (re. test (s )){
Return true;
} Else {
Return false;
}
}


/*
Purpose: Check whether the input string conforms to the positive integer format.
Input:
S: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function isNumber (s ){
Var regu = "^ [0-9] + $ ";
Var re = new RegExp (regu );
If (s. search (re )! =-1 ){
Return true;
} Else {
Return false;
}
}

/*
Purpose: Check whether the input string is in decimal number format. It can be a negative number.
Input:
S: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function isDecimal (str ){
If (isInteger (str) return true;
Var re =/^ [-] {0, 1} (\ d +) [\.] + (\ d +) $ /;
If (re. test (str )){
If (RegExp. $1 = 0 & RegExp. $2 = 0) return false;
Return true;
} Else {
Return false;
}
}

/*
Purpose: Check whether the value of the input object conforms to the port number format.
Input: str string
Return: If the verification succeeds, true is returned; otherwise, false is returned.

*/
Function isPort (str ){
Return (isNumber (str) & str <65536 );
}

/*
Purpose: Check whether the value of the input object complies with the E-Mail format.
Input: str string
Return: If the verification succeeds, true is returned; otherwise, false is returned.

*/
Function isEmail (str ){
Var myReg =/^ [-_ A-Za-z0-9] + @ ([_ A-Za-z0-9] + \.) + [A-Za-z0-9] {2, 3} $ /;
If (myReg. test (str) return true;
Return false;
}

/*
Purpose: Check whether the input string meets the amount format
The format is defined as a positive number with decimal places. A maximum of three decimal places can be entered.
Input:
S: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function isMoney (s ){
Var regu = "^ [0-9] + [\.] [0-9] {0, 3} $ ";
Var re = new RegExp (regu );
If (re. test (s )){
Return true;
} Else {
Return false;
}
}
/*
Purpose: Check whether the input string is composed of English letters, numbers, and underscores (_).
Input:
S: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function isNumberOr_Letter (s) {// determines whether it is a number or letter

Var regu = "^ [0-9a-zA-Z \ _] + $ ";
Var re = new RegExp (regu );
If (re. test (s )){
Return true;
} Else {
Return false;
}
}
/*
Purpose: Check whether the input string consists of only English letters and numbers.
Input:
S: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function isNumberOrLetter (s) {// determines whether it is a number or letter

Var regu = "^ [0-9a-zA-Z] + $ ";
Var re = new RegExp (regu );
If (re. test (s )){
Return true;
} Else {
Return false;
}
}
/*
Purpose: Check whether the input string consists of only Chinese characters, letters, and numbers.
Input:
Value: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function isChinaOrNumbOrLett (s) {// determines whether it is composed of Chinese characters, letters, and numbers.

Var regu = "^ [0-9a-zA-Z \ u4e00-\ u9fa5] + $ ";
Var re = new RegExp (regu );
If (re. test (s )){
Return true;
} Else {
Return false;
}
}

/*
Purpose: determine whether it is a date.
Input: date; fmt: date Format
Return: If the verification succeeds, true is returned; otherwise, false is returned.
*/
Function isDate (date, fmt ){
If (fmt = null) fmt = "yyyyMMdd ";
Var yIndex = fmt. indexOf ("yyyy ");
If (yIndex =-1) return false;
Var year = date. substring (yIndex, yIndex + 4 );
Var mIndex = fmt. indexOf ("MM ");
If (mIndex =-1) return false;
Var month = date. substring (mIndex, mIndex + 2 );
Var dIndex = fmt. indexOf ("dd ");
If (dIndex =-1) return false;
Var day = date. substring (dIndex, dIndex + 2 );
If (! IsNumber (year) | year> "2100" | year <"1900") return false;
If (! IsNumber (month) | month> "12" | month <"01") return false;
If (day> getMaxDay (year, month) | day <"01") return false;
Return true;
}

Function getMaxDay (year, month ){
If (month = 4 | month = 6 | month = 9 | month = 11)
Return "30 ";
If (month = 2)
If (year % 4 = 0 & amp; year % 100! = 0 | year % 400 = 0)
Return "29 ";
Else
Return "28 ";
Return "31 ";
}

/*
Purpose: whether character 1 ends with string 2
Input: str1: string; str2: contained string
Return: If the verification succeeds, true is returned; otherwise, false is returned.

*/
Function isLastMatch (str1, str2)
{
Var index = str1.lastIndexOf (str2 );
If (str1.length = index + str2.length) return true;
Return false;
}


/*
Purpose: whether character 1 starts with string 2
Input: str1: string; str2: contained string
Return: If the verification succeeds, true is returned; otherwise, false is returned.

*/
Function isFirstMatch (str1, str2)
{
Var index = str1.indexOf (str2 );
If (index = 0) return true;
Return false;
}

/*
Purpose: character 1 is a string containing 2
Input: str1: string; str2: contained string
Return: If the verification succeeds, true is returned; otherwise, false is returned.

*/
Function isMatch (str1, str2)
{
Var index = str1.indexOf (str2 );
If (index =-1) return false;
Return true;
}


/*
Purpose: Check whether the input start and end dates are correct. The rules are in the correct format for the two dates,
End on schedule> = Start Date
Input:
StartDate: start date, string
EndDate: end date, string
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function checkTwoDate (startDate, endDate ){
If (! IsDate (startDate )){
Alert ("Incorrect start date! ");
Return false;
} Else if (! IsDate (endDate )){
Alert ("the end date is incorrect! ");
Return false;
} Else if (startDate> endDate ){
Alert ("the start date cannot be later than the end date! ");
Return false;
}
Return true;
}

/*
Purpose: Check whether the entered Email address format is correct.
Input:
StrEmail: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function checkEmail (strEmail ){
// Var emailReg =/^ [_ a-z0-9] + @ ([_ a-z0-9] + \.) + [a-z0-9] {2, 3} $ /;
Var emailReg =/^ [\ w-] + (\. [\ w-] +) * @ [\ w-] + (\. [\ w-] +) + $ /;
If (emailReg. test (strEmail )){
Return true;
} Else {
Alert ("the Email address format you entered is incorrect! ");
Return false;
}
}

/*
Purpose: Check whether the entered phone number format is correct.
Input:
StrPhone: String
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function checkPhone (strPhone ){
Var phoneRegWithArea =/^ [0] [1-9] {2, 3}-[0-9] {5, 10} $ /;
Var phoneRegNoArea =/^ [1-9] {1} [0-9] {5, 8} $ /;
Var prompt = "the phone number you entered is incorrect! "
If (strPhone. length> 9 ){
If (phoneRegWithArea. test (strPhone )){
Return true;
} Else {
Alert (prompt );
Return false;
}
} Else {
If (phoneRegNoArea. test (strPhone )){
Return true;
} Else {
Alert (prompt );
Return false;
}


}
}


/*
Purpose: Check the number of selected check boxes.
Input:
CheckboxID: String
Return Value:
Returns the number of selected items in the check box.

*/

Function checkSelect (checkboxID ){
Var check = 0;
Var I = 0;
If (document. all (checkboxID). length> 0 ){
For (I = 0; I <document. all (checkboxID). length; I ++ ){
If (document. all (checkboxID). item (I). checked ){
Check + = 1;
}




}
} Else {
If (document. all (checkboxID). checked)
Check = 1;
}
Return check;
}

Function getTotalBytes (varField ){
If (varField = null)
Return-1;

Var totalCount = 0;
For (I = 0; I <varField. value. length; I ++ ){
If (varField. value. charCodeAt (I) & gt; 127)
TotalCount + = 2;
Else
TotalCount ++;
}
Return totalCount;
}

Function getFirstSelectedValue (checkboxID ){
Var value = null;
Var I = 0;
If (document. all (checkboxID). length> 0 ){
For (I = 0; I <document. all (checkboxID). length; I ++ ){
If (document. all (checkboxID). item (I). checked ){
Value = document. all (checkboxID). item (I). value;
Break;
}
}
} Else {
If (document. all (checkboxID). checked)
Value = document. all (checkboxID). value;
}
Return value;
}


Function getFirstSelectedIndex (checkboxID ){
Var value =-2;
Var I = 0;
If (document. all (checkboxID). length> 0 ){
For (I = 0; I <document. all (checkboxID). length; I ++ ){
If (document. all (checkboxID). item (I). checked ){
Value = I;
Break;
}
}
} Else {
If (document. all (checkboxID). checked)
Value =-1;
}
Return value;
}

Function selectAll (checkboxID, status ){

If (document. all (checkboxID) = null)
Return;

If (document. all (checkboxID). length> 0 ){
For (I = 0; I <document. all (checkboxID). length; I ++ ){

Document. all (checkboxID). item (I). checked = status;
}
} Else {
Document. all (checkboxID). checked = status;
}
}

Function selectInverse (checkboxID ){
If (document. all (checkboxID) = null)
Return;

If (document. all (checkboxID). length> 0 ){
For (I = 0; I <document. all (checkboxID). length; I ++ ){
Document. all (checkboxID). item (I). checked =! Document. all (checkboxID). item (I). checked;
}
} Else {
Document. all (checkboxID). checked =! Document. all (checkboxID). checked;
}
}

Function checkDate (value ){
If (value = '') return true;
If (value. length! = 8 |! IsNumber (value) return false;
Var year = value. substring (0, 4 );
If (year> "2100" | year <"1900 ")
Return false;

Var month = value. substring (4, 6 );
If (month> "12" | month <"01") return false;

Var day = value. substring (6, 8 );
If (day> getMaxDay (year, month) | day <"01") return false;

Return true;
}

/*
Purpose: Check whether the input start and end dates are correct. The rules are correct or empty.
And end date> = Start Date
Input:
StartDate: start date, string
EndDate: end date, string
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function checkPeriod (startDate, endDate ){
If (! CheckDate (startDate )){
Alert ("Incorrect start date! ");
Return false;
} Else if (! CheckDate (endDate )){
Alert ("the end date is incorrect! ");
Return false;
} Else if (startDate> endDate ){
Alert ("the start date cannot be later than the end date! ");
Return false;
}
Return true;
}

/*
Purpose: Check whether the securities code is correct
Input:
SecCode: securities code
Return Value:
If the verification succeeds, true is returned. Otherwise, false is returned.

*/
Function checkSecCode (secCode ){
If (secCode. length! = 6 ){
Alert ("the length of the securities code should be 6 characters ");
Return false;
}

If (! IsNumber (secCode )){
Alert ("securities code can only contain numbers ");


Return false;
}
Return true;
}

/*************************************** *************
Function: cTrim (sInputString, iType)
Description: String space-removing Function
Parameters: iType: 1 = remove the space on the left of the string

2 = remove the space on the left of the string
0 = remove spaces on the left and right of the string
Return value: a string that removes spaces.
**************************************** ************/
Function cTrim (sInputString, iType)
{
Var sTmpStr = '';
Var I =-1;

If (iType = 0 | iType = 1)
{
While (sTmpStr = '')
{
++ I;
STmpStr = sInputString. substr (I, 1 );
}
SInputString = sInputString. substring (I );
}

If (iType = 0 | iType = 2)
{
STmpStr = '';
I = sInputString. length;
While (sTmpStr = '')
{
-- I;
STmpStr = sInputString. substr (I, 1 );
}
SInputString = sInputString. substring (0, I + 1 );
}
Return sInputString;
}

/*