JS Common 2 Comparison of the commonly used functions 1th/3 page _javascript Tips

/*
-------------------------------------------------------------------------------
File name: Check.js
Description: JavaScript script, used to check the input data of the Web page submission Form
Version: 1.0
*/
/*
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;
}

Current 1/3 page 123 Next read the full text