How to check Date is Valid or not with leap year validation
function CheckDate() {
var Date = $('#<%= ddlDate.ClientID %>').val();
var Month = $('#<%= ddlMonth.ClientID %>').val();
var Year = $('#<%= ddlYear.ClientID %>').val();
if (parseInt(Date) > 0) {
txtDate = Month + '/' + Date + '/' + Year;
var currVal = txtDate;
if (currVal == '') {
alert('Invalid Date');
return false;
}
var rxDatePattern = /^(\d{1,2})(\/|-)(\d{1,2})(\/|-)(\d{4})$/; //Declare Regex
var dtArray = currVal.match(rxDatePattern); // is format OK?
if (dtArray == null) {
alert('Invalid Date');
return false;
}
//Date Format is mm/dd/yyyy format.
dtMonth = dtArray[1];
dtDay = dtArray[3];
dtYear = dtArray[5];
if (dtMonth < 1 || dtMonth > 12) {
alert('Invalid Date');
return false;
}
else if (dtDay < 1 || dtDay > 31) {
alert('Invalid Date');
return false;
}
else if ((dtMonth == 4 || dtMonth == 6 || dtMonth == 9 || dtMonth == 11) && dtDay == 31) {
alert('Invalid Date');
return false;
}
else if (dtMonth == 2) {
var isleap = (dtYear % 4 == 0 && (dtYear % 100 != 0 || dtYear % 400 == 0));
if (dtDay > 29 || (dtDay == 29 && !isleap)) {
alert('Invalid Date');
return false;
}
}
return true;
}
return true;
}