JS Date Format Judge code

/**
Determine the date format entered in the input box is YYYY-MM-DD and the correct date
*/
function IsDate (sm,mystring) {
var reg =/^ (d{4})-(D{2})-(d{2}) $/;
var str = mystring;
var arr = reg.exec (str);
if (str== "") return true;
if (!reg.test (str) &&regexp.$2<=12&&regexp.$3<=31) {
Alert ("Please ensure that the date format entered in +sm+ is YYYY-MM-DD or the correct date!");
return false;
}
return true;
}

Method Two

//---------------------------------------------------------------------------
Determine if the date format is correct
The return value is an error message and no error message indicates a valid date string
function isdatestring (strdate) {
var strseparator = "-"; Date Separator
var Strdatearray;
var intyear;
var intmonth;
var intday;
var boolleapyear;
var errormsg = ""; Error message
Strdatearray = Strdate.split (strseparator);
No judgment length, in fact 2008-8-8 is also reasonable//strdate.length!= 10 | |
if (strdatearray.length!= 3) {
ErrorMsg + = "date format must be: YYYY-MM-DD";
return errormsg;
}
Intyear = parseint (strdatearray[0],10);
Intmonth = parseint (strdatearray[1],10);
Intday = parseint (strdatearray[2],10);
if (isNaN (intyear) | | isNaN (intmonth) | | isNaN (Intday)) {
ErrorMsg + = "date format error: Year and month date must be a pure number";
return errormsg;
}
if (intmonth>12 | | intmonth<1) {
ErrorMsg + = "date format error: Month must be between 1 and 12";
return errormsg;
}
if (intmonth==1| | intmonth==3| | intmonth==5| | Intmonth==7
|| intmonth==8| |intmonth==10| | INTMONTH==12)
&& (intday>31| | intday<1)) {
ErrorMsg = = "date format error: Semi-rotary must be between 1 and 31 days";
return errormsg;
}
if (intmonth==4| | intmonth==6| | intmonth==9| | INTMONTH==11)
&& (intday>30| | intday<1)) {
ErrorMsg + = "Date format error: The number of days must be between 1 to 31";
return errormsg;
}
if (intmonth==2) {
if (Intday < 1) {
ErrorMsg + = "date format error: Date must be greater than or equal to 1";
return errormsg;
}
Boolleapyear = false;
if ((intyear%100) = = 0) {
if ((intyear%400) = = 0)
Boolleapyear = true;
}
else{
if ((intyear% 4) = = 0)
Boolleapyear = true;
}
if (boolleapyear) {
if (Intday > 29) {
ErrorMsg + = "date format error: Leap year of February days can not exceed 29";
return errormsg;
}
} else {
if (Intday > 28) {
ErrorMsg + = "date format error: Non-leap year February days cannot exceed 28";
return errormsg;
}
}
}
return errormsg;
}

Method Three

Function Name: Checkdatetime
Feature Description: Check whether the date time
function Checkdatetime (str) {
var reg =/^ (d+)-(d{1,2})-(d{1,2}) (d{1,2}):(d{1,2}):(d{1,2}) $/;
var r = Str.match (reg);
if (r==null) return false;
R[2]=r[2]-1;
var d= new Date (r[1], r[2],r[3], r[4],r[5], r[6]);
if (D.getfullyear ()!=r[1]) return false;
if (D.getmonth ()!=r[2]) return false;
if (D.getdate ()!=r[3]) return false;
if (D.gethours ()!=r[4]) return false;
if (D.getminutes ()!=r[5]) return false;
if (D.getseconds ()!=r[6]) return false;
return true;
}

Other

String.prototype.isvalidtime=function ()
{
var resule=this.match (/^ (d{1,2}) (:)? d{1,2}) 2 (d{1,2}) $/);
if (result==null) return false;
if (result[1]>24 | | result[3]>60 | | result[4]>60) return FALSE;
return true;
} string.prototype.isvaliddate=function ()
{
var result=this.match (/^ (d{1,4}) (-|/) (d{1,2}) 2 (d{1,2}) $/);
if (result==null) return false;
var d=new Date (Result[1], result[3]-1, result[4]);
Return (D.getfullyear () ==result[1]&&d.getmonth () +1==result[3]&&d.getdate () ==result[4]);
}

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