Two Dates code validation

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B.PREM KUMAR

Two Dates code validation
2 Answer(s) 4 years ago
Posted in : Date-Calendar

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May 20, 2009 at 4:47 PM

Hi Friend,

Try the following code:

<html>
<head>
<Script language="JavaScript">
function check(objName) {
var datefield = objName;
if (isDate(objName) == false) {
datefield.select();
alert("Invalid dates.");
datefield.focus();
return false;
}
else {
return true;
}
}
function isDate(objName) {
var strDatestyle = "US";
var strDate;
var strDateArray;
var strDay;
var strMonth;
var strYear;
var intday;
var intMonth;
var intYear;
var booFound = false;
var datefield = objName;
var strSeparadate2rArray = new Array("-"," ","/",".");
var intElementNr;
var err = 0;
var strMonthArray = new Array(12);
strMonthArray[0] = "Jan";
strMonthArray[1] = "Feb";
strMonthArray[2] = "Mar";
strMonthArray[3] = "Apr";
strMonthArray[4] = "May";
strMonthArray[5] = "Jun";
strMonthArray[6] = "Jul";
strMonthArray[7] = "Aug";
strMonthArray[8] = "Sep";
strMonthArray[9] = "Oct";
strMonthArray[10] = "Nov";
strMonthArray[11] = "Dec";
strDate = datefield.value;
if (strDate.length < 1) {
return true;
}
for (intElementNr = 0; intElementNr < strSeparadate2rArray.length; intElementNr++) {
if (strDate.indexOf(strSeparadate2rArray[intElementNr]) != -1) {
strDateArray = strDate.split(strSeparadate2rArray[intElementNr]);
if (strDateArray.length != 3) {
err = 1;
return false;
}
else {
strDay = strDateArray[0];
strMonth = strDateArray[1];
strYear = strDateArray[2];
}
booFound = true;
}
}
if (booFound == false) {
if (strDate.length>5) {
strDay = strDate.substr(0, 2);
strMonth = strDate.substr(2, 2);
strYear = strDate.substr(4);
}
}
if (strYear.length == 2) {
strYear = '20' + strYear;
}
if (strDatestyle == "US") {
strTemp = strDay;
strDay = strMonth;
strMonth = strTemp;
}
intday = parseInt(strDay, 10);
if (isNaN(intday)) {
err = 2;
return false;
}
intMonth = parseInt(strMonth, 10);
if (isNaN(intMonth)) {
for (i = 0;i<12;i++) {
if (strMonth.toUpperCase() == strMonthArray[i].toUpperCase()) {
intMonth = i+1;
strMonth = strMonthArray[i];
i = 12;
}
}
if (isNaN(intMonth)) {
err = 3;
return false;
}
}
intYear = parseInt(strYear, 10);
if (isNaN(intYear)) {
err = 4;
return false;
}
if (intMonth>12 || intMonth<1) {
err = 5;
return false;
}
if ((intMonth == 1 || intMonth == 3 || intMonth == 5 || intMonth == 7 || intMonth == 8 || intMonth == 10 || intMonth == 12) && (intday > 31 || intday < 1)) {
err = 6;
return false;
}
if ((intMonth == 4 || intMonth == 6 || intMonth == 9 || intMonth == 11) && (intday > 30 || intday < 1)) {
err = 7;
return false;
}
if (intMonth == 2) {
if (intday < 1) {
err = 8;
return false;
}
if (LeapYear(intYear) == true) {
if (intday > 29) {
err = 9;
return false;
}
}
else {
if (intday > 28) {
err = 10;
return false;
}
}
}
if (strDatestyle == "US") {
datefield.value = strMonthArray[intMonth-1] + " " + intday+" " + strYear;
}
else {
datefield.value = intday + " " + strMonthArray[intMonth-1] + " " + strYear;
}
return true;
}
function LeapYear(intYear) {
if (intYear % 100 == 0) {
if (intYear % 400 == 0) { return true; }
}
else {
if ((intYear % 4) == 0) { return true; }
}
return false;
}

May 20, 2009 at 4:48 PM

continue....................

function doDateCheck(date1, date2) {
if (Date.parse(date1.value) <= Date.parse(date2.value)) {
alert("The dates are valid.");
}
else {
if (date1.value == "" || date2.value == "")
alert("Enter date.");
else
alert("Date of joining must be greater than date of birth.");
}
}
</script>
</head>
<form>
<table>
<tr><td>Enter Date of Birth:</td><td><input type="text" name="date1" onBlur="check(this)" ></td></tr>
<tr><td>Enter Date of Joining:</td><td><input type=text name="date2" onBlur="check(this)"></td></tr>
<tr><td><input type="button" onClick="doDateCheck(this.form.date1, this.form.date2);" value="checkDate"></td></tr>
</table>
</form>
</html>

Thanks

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