JS verification form Daquan _javascript skills

Good JS verification ~~~~~~~~~~~~~~~~~~~~~~~~~
Purpose: Verify the format of IP address
Input: Strip:ip Address
Returns: False if return true through validation;

*/
function IsIP (StrIP) {
if (IsNull (StrIP)) return false;
var re=/^ (\d+) \. (\d+) \. (\d+) \. (\d+) $/g//matching the regular expression of the IP address
if (Re.test (StrIP))
{
if (regexp.$1 <256 && regexp.$2<256 && regexp.$3<256 && regexp.$4<256) return true;
}
return false;
}

/*
Purpose: Check if the input string is empty or all are spaces
Input: str
Return:
Returns true if all is null, or False
*/
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 input string
Return: False if return true through validation

*/
function Isinteger (str) {
var regu =/^[-]{0,1}[0-9]{1,}$/;
return Regu.test (str);
}

/*
Purpose: Check whether the input mobile phone number is correct
Input:
S: string
Return:
Returns False if the validation returns true

*/
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 if the input string conforms to the positive integer format
Input:
S: string
Return:
Returns False if the validation returns true

*/
function Isnumber (s) {
var Regu = "^[0-9]+$";
var re = new RegExp (Regu);
if (S.search (re)!=-1) {
return true;
} else {
return false;
}
}

/*
Purpose: Check if the input string is a decimal number format, can be negative
Input:
S: string
Return:
Returns False if the validation returns true

*/
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 if the value of the input object conforms to the port number format
Input: str input string
Return: False if return true through validation

*/
function Isport (str) {
Return (Isnumber (str) && str<65536);
}

/*
Purpose: Check if the value of the input object conforms to the e-mail format
Input: str input string
Return: False if return true through validation

*/
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 conforms to the amount format
The format is defined as a positive number with decimals, with a maximum of three digits after the decimal point
Input:
S: string
Return:
Returns False if the validation returns true

*/
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 if the input string is composed of English letters and numbers and underscores only
Input:
S: string
Return:
Returns False if the validation returns true

*/
function Isnumberor_letter (s) {//Judge 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 if the input string is made up of English letters and numbers only
Input:
S: string
Return:
Returns False if the validation returns true

*/
function Isnumberorletter (s) {//Judge 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 if the input string is composed of Chinese characters, letters and numbers only
Input:
Value: String
Return:
Returns False if the validation returns true

*/
function Ischinaornumborlett (s) {//Judge whether it is Chinese characters, letters, numbers

var Regu = "^[0-9a-za-z\u4e00-\u9fa5]+$";
var re = new RegExp (Regu);
if (Re.test (s)) {
return true;
}else{
return false;
}
}

/*
Use: Determine whether the date
Enter: Date: dates; FMT: date format
Return: False if return true through validation
*/
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> "2100" | | year< "1900") return false;
if (!isnumber (month) | | Month> "12" | | month< "") return false;
if (Day>getmaxday (year,month) | | | | day< ") 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&&year%100!=0 | | year%400==0)
return "29";
Else
Return "28";
return "31";
}

/*
Usage: Character 1 ends with string 2
Input: str1: string; str2: contained string
Return: False if return true through validation

*/
function Islastmatch (STR1,STR2)
{
var index = str1.lastindexof (STR2);
if (str1.length==index+str2.length) return true;
return false;
}


/*
Usage: Character 1 starts with string 2
Input: str1: string; str2: contained string
Return: False if return true through validation

*/
function Isfirstmatch (STR1,STR2)
{
var index = str1.indexof (STR2);
if (index==0) return true;
return false;
}

/*
Purpose: Character 1 is the containing string 2
Input: str1: string; str2: contained string
Return: False if return true through validation

*/
function IsMatch (STR1,STR2)
{
var index = str1.indexof (STR2);
if (index==-1) return false;
return true;
}


/*
Purpose: Check that the input start and end date is correct, the rule is two date of the correct format,
And end the scheduled >= start date
Input:
StartDate: Start Date, string
EndDate: End as scheduled, string
Return:
Returns False if the validation returns true

*/
function Checktwodate (startdate,enddate) {
if (!isdate (StartDate)) {
Alert ("Incorrect start date!");
return false;
else if (!isdate (EndDate)) {
Alert ("Incorrect end date!");
return false;
else if (StartDate > EndDate) {
Alert ("Start date cannot be greater than End date!");
return false;
}
return true;
}

/*
Purpose: Check the format of email box entered correctly
Input:
Stremail: String
Return:
Returns False if the validation returns true

*/
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 you entered is not in the correct format!") ");
return false;
}
}

/*
Purpose: Check the format of the phone number you entered correctly
Input:
Strphone: String
Return:
Returns False if the validation returns true

*/
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 not correct!"
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 check boxes selected
Input:
CHECKBOXID: String
Return:
Returns the number of selected in this 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) > 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> "| | month<") return false;

var day = value.substring (6,8);
if (Day>getmaxday (year,month) | | | | day< ") return false;

return true;
}

/*
Purpose: Check that the date entered is correct, the rule is two dates are in the correct format or are empty
and end Date >= start date
Input:
StartDate: Start Date, string
EndDate: End Date, string
Return:
Returns False if the validation returns true

*/
function Checkperiod (startdate,enddate) {
if (!checkdate (StartDate)) {
Alert ("Incorrect start date!");
return false;
else if (!checkdate (EndDate)) {
Alert ("Incorrect end date!");
return false;
else if (StartDate > EndDate) {
Alert ("Start date cannot be greater than End date!");
return false;
}
return true;
}

/*
Purpose: Check the security code is correct
Input:
Seccode: Securities Code
Return:
Returns False if the validation returns true

*/
function Checkseccode (seccode) {
if (Seccode.length!=6) {
Alert ("The length of the securities code should be 6 digits");
return false;
}

if (!isnumber (Seccode)) {
Alert ("The Securities code can contain only numbers");


return false;
}
return true;
}

/****************************************************
Function:ctrim (Sinputstring,itype)
Description: A function of a string to space
parameters:itype:1= Remove the space on the left side of the string

2= Remove the space on the left side of the string
0= Remove the space on the left and right side of the string
Return value: A string that removes a space
****************************************************/
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;
}

/*