(Eg: 2001-3-7 2001/3/7 2001.3.7)
Year, month, day must complete
Japan can not
Month and day can not
<Script language = javascript src = "Scroll.js"> // *********************************** ************************************************** ********************* function fnOnclick () {var strDate = fnRemoveBrank (document.all.cnlDate.value); var intCheckRadio = 0; if (document.all .cnlRadio [1] .checked) {intCheckRadio = 1;} else if (document.all.cnlRadio [2] .checked) {intCheckRadio = 2;}! if (fnCheckDate (strDate, intCheckRadio)) {alert ( "date does not legal ");} else {alert (" valid date ");}} // ******************************* ************************************************** ************************************************************ // author: between the date of the check function, supports three-year, month, day: Lin Manxing // function delimiter "-", ".", and "/" can select the year, month, day whether it should complete. // correct date format: 2001-2-132001 2001-2 2001.2.13 2001. 2 2001/2/3, date range from 1-1-1 to 9999-12-31 // Meanwhile, the number of days of the current month of the current year also made a judgment, such as: all 2001-2-29 2001-4-31 // parameters are illegal date: strDate ---- need to determine the date string // intFlag: 1 ---- ---- February can not be no day and date must be months 0 ---- // return value range: true ---- ---- date to false lawfully illegal function fnCheckDate (strDate, intFlag) {var strCheckDate = strDate + ""; // but where further confirmed character string is definitely determined string if (strCheckDate == "") // null string, the string is not a valid date, returns false {return false;} // Analyzing the data passed in is written in that format date var intIndex = -1; // use regular expressions to find the string contains a character not found -1, otherwise (0 - String.length - 1) var arrDate; // store date var regExpInfo = //./; . "" // regular expression matching the first to appear // here, the reason I do not use all the functions and replace "/" with ".", "-", and then were stored in Day, because the user might enter 2001 / 3-2, we can not judge that it is not a legitimate date intIndex = strCheckDate.search (regExpInfo); // find whether it contains if (intIndex == - 1) / "." / does not contain {regExpInfo = / - /; intIndex = strCheckDate.search (regExpInfo);
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Source code is as follows:
===========================================================
<HTML>
<HEAD>
<META NAME="GENERATOR" Content="Microsoft Visual Studio 6.0">
</HEAD>
<BODY>
<input name="cnlDate" id="cnlDate" value="">（如：2001-3-7 2001/3/7 2001.3.7）
<br>
<input name="cnlRadio" id="Radio" value="0" type="radio" checked>年、月、日必须齐全<br>
<input name="cnlRadio" id="Radio" value="1" type="radio">可以没有日<br>
<input name="cnlRadio" id="Radio" value="2" type="radio">可以没有月和日<br>
<input name="cnlButton" name="cnlButton" type="button" value="日期检查" οnclick="fnOnclick()">
</BODY>
</HTML>
<script language="javascript" src="Scroll.js">
//**********************************************************************************************************
function fnOnclick()
{
var strDate = fnRemoveBrank(document.all.cnlDate.value);
var intCheckRadio = 0;
if(document.all.cnlRadio[1].checked)
{
intCheckRadio = 1;
}
else if(document.all.cnlRadio[2].checked)
{
intCheckRadio = 2;
}
if(!fnCheckDate(strDate,intCheckRadio)) { the else } Alert ( "invalid date");
{
alert ( "valid date");
}
}
// **************************** ************************************************** ********
// function: date check function, supports three years, a separator between the month, day "-" and "/" can select the year, month, day whether it should complete. "" .
// correct date format: 2001-2-132001 2001-2 2001.2.13 2001.2 2001/2/3, date range from 1-1-1 to 9999-12-31
// At the same time, the current month of the current year the judge also made a number of days, such as: 2001-2-29 2001-4-31 illegal date
// parameters: strDate ---- need to determine the date string
// intFlag: 1 ---- can not February can not ---- 0 ---- day and month date must complete
// return value: true ---- lawfully false ---- date illegal
function fnCheckDate (strDate, INTFLAG)
{
var strCheckDate = strDate + ""; // but where further confirmed character string is a series of affirmative determination
if (strCheckDate == "") // null string, the string is not a valid date, returns to false
{
return to false;
}
/ / judgment is passed in the data written in that format date
var intIndex = -1; // use regular expressions to find the string contains a character not found -1, otherwise (0 - String.length - 1)
var arrDate; // store date
"."; var regExpInfo = //./ // regular expression matching the first to appear
// here, the reason I do not use all the functions and replace "/" with "-". " "and then store the date, because the user is likely to enter the 2001 / 3-2, you can not judge that it is not a legitimate date
intIndex = strCheckDate.search (regExpInfo); // Find if they contain". "
iF ( intIndex == - 1) // does not contain
{
regExpInfo = //;
intIndex = strCheckDate.search (regExpInfo);
iF (intIndex == -1)
{
regExpInfo = ////; // find whether it contains "/"
= strCheckDate.search intIndex (regExpInfo);
IF (intIndex == -1)
{
arrDate the Array = new new (strCheckDate);// contains only of
}
the else
{
arrDate = strCheckDate.split ( "/") ; // 2001/3/7 type
}
}
the else
{
arrDate = strCheckDate.split ( "-"); // 2001-3-7 type
}
}
the else
{
arrDate = strCheckDate. split ( "."); //2001.3.7 type
}
IF (arrDate.length>. 3) // if more than three separate items, in addition there are other, not legal date date, returns to false
{
return to false ;
}
the else iF (arrDate.length> 0)
{
// determines whether legitimate
if (fnIsIntNum (arrDate [0] )) // is a positive integer
{
iF (the parseInt (arrDate [0]) <. 1 || the parseInt (arrDate [ 0])> 9999) in the range of //. 1 - 9999
{
return to false;
}
}
the else
{
return false; // not a positive integer of, error
}
if valid month @ Analyzing
IF (arrDate.length>. 1)
{
IF (fnIsIntNum (arrDate [. 1])) // is a positive integer
{
IF (the parseInt (arrDate [. 1] ) <. 1 || the parseInt (arrDate [. 1])> 12 is)
{
return to false;
}
}
the else
{
return to false;
}
}
the else // no monthly
{
! IF (INTFLAG = 2) have to have // month
{
return to false ;
}
}
// determines whether the valid date
iF (arrDate.length> 2)
{
iF (fnIsIntNum (arrDate [2])) // is a positive integer
{
var intDayCount = fnComputerDay(parseInt(arrDate[0]),parseInt(arrDate[1]));
if(intDayCount < parseInt(arrDate[2]))
{
return false;
}
}
else
{
return false;
}
}
else
{
if(intFlag == 0) //必须得有日
{
return false;
}
}
}
return true;
}
// **************************** ************************************************** ********
// determines whether the number is a positive integer
@ parameters: strNum ---- need to determine the string
// return value: true ---- ---- integer to false non-integer
function fnIsIntNum (strNum)
{
var strCheckNum strNum + = "";
IF (strCheckNum.length <. 1) // empty string
return to false;
the else IF (isNaN (strCheckNum)) // not a numerical value
return to false;
the else IF (the parseInt (strCheckNum ) <1) // not positive
return to false;
the else IF (parseFloat (strCheckNum)> the parseInt (strCheckNum)) is not an integer //
return to false;
return to true;
}
// **************************** ************************************************** ********
// function: determining the number of days on intMonth intYear month
// returns: the number of days of the month intYear on intMonth
function fnComputerDay (intYear, intMonth)
{
var = new new dtmDate a Date (intYear, intMonth, -1 );
var intDay dtmDate.getDate = () +. 1;
return intDay;
}
// **************************** ************************************************** ******** // function: removing the spaces before and after the string
// return value: after removing the string of spaces
function fnRemoveBrank (strSource)
{
return strSource.replace (/ ^ / S * /, ''). Replace (S * $ // /, '');
}
</ Script>
