JS Common Custom Function Summary _ Basics

Copy Code code as follows:

String.prototype.trim = function () {
Return This.replace (/(^\s*) | ( \s*$)/g, "");
}

Check to see if it's a date format
function IsDate (DATESTR) {
var result = Datestr.match (/(^ (1[8-9]\d{2}) | ( [2-9]\d{3})] (-) (10|12|0?[ 13578]) (-) (3[01]|[ 12][0-9]|0? [1-9]) $)| (^ (1[8-9]\d{2}) | ([2-9]\d{3})] (-) (11|0?) [469]) (-) (30| [12] [0-9]|0? [1-9]) $)| (^ (1[8-9]\d{2}) | ([2-9]\d{3})] (-) (0?2) (-) (2[0-8]|1[0-9]|0?) [1-9]) $)| (^ ([2468][048]00) (-) (0?2) (-) (29) $) | (^ ([3579][26]00) (-) (0?2) (-) (29) $) | (^ ([1][89][0][48]) (-) (0?2) (-) (29) $) | (^ ([2-9][0-9][0][48]) (-) (0?2) (-) (29) $) | (^ ([1][89][2468][048]) (-) (0?2) (-) (29) $) | (^ ([2-9][0-9][2468][048]) (-) (0?2) (-) (29) $) | (^ ([1][89][13579][26]) (-) (0?2) (-) (29) $) | (^ ([2-9][0-9][13579][26]) (-) (0?2) (-) (29) $)) /);
if (result==null) {
Return "No";
}
return "yes";
}

This method is consistent with the above effect
function IsDate2 (DATESTR) {
var result = Datestr.match (/^ (\d{1,4}) (-|\/) (\d{1,2}) \2 (\d{1,2});
if (result = = null)
Return "No";
var d = new Date (result[1], result[3]-1, result[4]);
if ((d.getfullyear () = = Result[1] && (D.getmonth () + 1) = = Result[3] && d.getdate () = = Result[4]) {
return "yes";
}
Return "No";
}

Determine if the character entered is Chinese
function Ischinese (str) {
if (str.length!=0) {
reg=/^[\u0391-\uffe5]+$/;
if (!reg.test (str)) {
Alert ("Sorry, the string type you typed is not well-formed!");
Return "No";
}
}
return "yes";
}


To determine if it is empty
function IsEmpty (str) {
if (str==null| | typeof str== "Undefined" | | Str.trim () = = "") {
return true;
}else{
return false;
}
}

Fixed telephone
function Testtelephone (phone) {
var phone_reg = new RegExp (/^ ([+]{0,1}\d{3,4}|\d{3,4}-)? \d{7,8}$/);
if (!phone_reg.test (phone)) {
Return "No";
}
return "yes";
}
Discount
function Isdiscount (discount) {
var phone_reg = new RegExp (/^ (0) ([\.] \d{1,2}) |1|1.00|1.0) $/);
if (!phone_reg.test (discount)) {
Return "No";
}
return "yes";
}
Mobile phone number
function Testmobile (MOBILE) {
var mobile_reg = new RegExp (/^0{0,1}1[0-9]{10}$/);
if (!mobile_reg.test (mobile)) {
Return "No";
}
return "yes";
}
QQ number starting from 10000
function Testqq (QQ) {
var qq_reg = new RegExp (/^[1-9][0-9]{4,}$/);
if (!qq_reg.test (QQ)) {
Return "No";
}
return "yes";
}
Email
function Testemail (email) {
var email_reg = new RegExp (/^\w+ ([-+.] \w+) *@\w+ ([-.] \w+) *.\w+ ([-.] \w+) *$/);
if (!email_reg.test (email)) {
Return "No";
}
return "yes";
}

Positive integers with no symbols
function Testplusdigit (digit) {
var plusdigit_reg = new RegExp (/^\d+$/);
if (!plusdigit_reg.test (digit)) {
Return "No";
}
return "yes";
}

Double Price
function Testpriceformat (str) {
var priceformatreg = new RegExp (/^\d+ (. \d{1,2})? $/);
if (!priceformatreg.test (str)) {
Return "No";
}
return "yes";
}

Id
function Testidcard (str) {
var idcardreg = new RegExp (/(^\d{15}$) | ( ^\D{17} ([0-9]| X) $)/);
if (! Idcardreg.test (str)) {
Return "No";
}
return "yes";
}

2012-06-19 Date format
function TestDate (str) {
var datereg = new RegExp (/(^\d{4}-[0,1][0-9]-[0-3][0-9]$)/);
if (!datereg.test (str)) {
Return "No";
}
return "yes";
}



Floating-point precision operations (addition)
function Accadd (ARG1,ARG2) {
var r1,r2,m,n;
Try{r1=arg1.tostring (). Split (".") [1].length}catch (e) {r1=0}
Try{r2=arg2.tostring (). Split (".") [1].length}catch (e) {r2=0}
M=math.pow (10,math.max (R1,R2));
N= (R1>=R2) r1:r2;
Return ((arg1*m+arg2*m)/m). ToFixed (n);
}
Number.prototype.add = function (ARG) {
Return Accadd (Arg,this);
}

Floating-point precision operations (subtraction)
function Accsub (ARG1,ARG2) {
Return Accadd (ARG1,-ARG2);
}
Number.prototype.subtract = function (ARG) {
Return Accsub (THIS,ARG);
}

Floating-point precision operations (multiplication)
function Accmul (ARG1,ARG2)
{
var m=0,s1=arg1.tostring (), s2=arg2.tostring ();
Try{m+=s1.split (".") [1].length}catch (e) {}
Try{m+=s2.split (".") [1].length}catch (e) {}
Return number (S1.replace (".", "")) *number (S2.replace (".", ""))/math.pow (10,m)
}
Number.prototype.mul = function (ARG) {
Return Accmul (ARG, this);
}

Floating-point precision Operations (division)
function Accdiv (ARG1,ARG2) {
var t1=0,t2=0,r1,r2;
Try{t1=arg1.tostring (). Split (".") [1].length}catch (e) {}
Try{t2=arg2.tostring (). Split (".") [1].length}catch (e) {}
With (Math) {
R1=number (Arg1.tostring (). Replace (".", ""))
R2=number (Arg2.tostring (). Replace (".", ""))
Return (R1/R2) *pow (10,T2-T1);
}
}
Number.prototype.div = function (ARG) {
Return Accdiv (this, ARG);
}

Limit input Numbers
function Isnumber (e) {
if ($.browser.msie) {
if ((Event.keycode >) && (Event.keycode < 58) | |
(Event.keycode = 8)) {
return true;
} else {
return false;
}
} else {
if ((E.which >) && (E.which < 58) | |
(E.which = 8)) {
return true;
} else {
return false;
}
}
}


String length interception
function Cutstr (str, len) {
var temp;
var icount = 0;
var patrn =/[^\x00-\xff]/;
var Strre = "";
for (var i = 0; i < str.length; i++) {
if (Icount < len-1) {
temp = Str.substr (i, 1);
if (patrn.exec (temp) = null) {
icount = icount + 1;
} else {
icount = icount + 2;
}
Strre + temp;
} else {
Break
}
}
return Strre + "...";
}

Get the domain name Master
function GetHost (URL) {
var host = "NULL";
if (typeof url = = "undefined" | | | null = = URL) {
url = window.location.href;
}
var regex =/^\w+\:\/\/([^\/]*). * *;
var match = Url.match (regex);
if (typeof match!= "undefined" && null!= match) {
host = match[1];
}
return host;
}

Determine if a value is in range
Rang=1 represents a positive integer [0,2147483647] 2 for Float[0,3.4028235e38]
return= ' empty ' means null input,
function Israng (Str,rang) {
if (typeof str = = "number") {
var num = number (str);
Determines whether a positive integer range
if (rang = = 1) {
if (testplusdigit (num) = "yes") {
if (num>=0&&num<=2147483647) {
return "Is_int";
}else{
return "Is_not_int_rang";
}
}else{
return "Is_not_int";
}
}else if (rang = = 2) {
if (Testpriceformat (num) = "yes") {
if (num>=0&&num<=3.4028235e38) {
return "Is_float";
}else{
return "Is_not_float_rang";
}
}else{
return "Is_not_float";
}
}else{
return "Rang_is_not_right";
}
}else{
return "Is_not_number";
}
}