Javascript validation not working

Question

I have three dropdown for day,month,year

 

There are two dates on is  DateFrom and other is DateTo,

 

i want to use validate for DateTo not should is greater Then Date From

and day should be 28 for feb and 29 for Leap Year. 

 

here is my code please check

 

Validation Script 

 

<script type="text/javascript">

function validate()

{

var dateFrom = $('#ddd').val() + '-' + $('#ddm').val() + '-' + $('#ddy').val();

var dateTo = $('#dd').val() + '-' + $('#mm').val() + '-' + $('#yy').val();

var checkAlert = "true";

var dateTimeValue = dateFrom;

var dateTimeToValue = dateTo;

var dateDataFrom = dateTimeValue.split("-");

var dayFrom = (dateDataFrom[0]);

var monthFrom = (dateDataFrom[1]);

var yearFrom = (dateDataFrom[2]);

var dateDataTo = dateTimeToValue.split("-");

var dayTo = (dateDataTo[0]);

var monthTo = (dateDataTo[1]);

var yearTo = (dateDataTo[2]);

if (dateTimeValue != "" && dateTimeToValue != "") {

if (dateTimeValue > dateTimeToValue) {

alert("DateFrom can not greater then DateTo.");

return false;

}

else if (dateTimeValue.indexOf("_") > -1 || dateTimeValue.length < 10) {

alert("Please enter valid date in (dd-mm-yyyy) format.");

document.getElementById("dateFrom").value = "";

return false;

}

else if (dateTimeToValue.indexOf("_") > -1 || dateTimeValue.length < 10) {

alert("Please enter valid date in (dd-mm-yyyy) format.");

document.getElementById("dateTo").value = "";

return false;

}

else if (!validateDateTime(dateTimeValue)) {

alert("Please enter valid date. in DateFrom");

document.getElementById("dateFrom").value = "";

document.getElementById("dateTo").value = "";

return false;

}

else if (!validateDateTime(dateTimeToValue)) {

alert("Please enter valid date. in DateTo");

document.getElementById("dateTo").value = "";

document.getElementById("dateFrom").value = "";

return false;

}

else if (yearFrom > yearTo) {

alert('from year is greater than to year');

document.getElementById("dateFrom").value = "";

document.getElementById("dateTo").value = "";

}

else if (yearFrom < yearTo || yearFrom == yearTo) {

if (monthFrom > monthTo) {

alert('Enter Month Correctly');

document.getElementById("dateFrom").value = "";

document.getElementById("dateTo").value = "";

return false;

}

}

else if (yearFrom < yearTo || yearFrom == yearTo) {

if (monthFrom < monthTo || monthFrom == monthTo) {

if (dayFrom > dayTo) {

alert('Enter Date Correctly');

document.getElementById("dateFrom").value = "";

document.getElementById("dateTo").value = "";

return false;

}

}

}

}

function validateDateTime(date) {

var valid = true;

var dateData = date.split("-");

var day = (dateData[0]);

var month = (dateData[1]);

var year = (dateData[2]);

var regForDate = /^[0-3]?[0-9].[0-3]?[0-9].(?:[0-9]{2})?[0-9]{2}$/;

if (!date.match(regForDate)) {

valid = false;

}

else if ((month < 1) || (month > 12)) valid = false;

else if ((day < 1) || (day > 31)) valid = false;

else if (((month == 4) || (month == 6) || (month == 9) || (month == 11)) && (day > 30)) valid = false;

else if ((month == 2) && (((year % 400) == 0) || ((year % 4) == 0)) && ((year % 100) != 0) && (day > 29)) valid = false;

else if ((month == 2) && ((year % 100) == 0) && (day > 29)) valid = false;

return false;

}

return true;

}

</script>

 

.aspx page:- 

 

<label for="dateFrom">Date From</label>

<SELECT class="combine" id ="ddd" name = "dd"></SELECT>

<SELECT class="combine" id ="ddm" name = "mm"></SELECT>

<SELECT class="combine" id ="ddy" name = "yyyy" ></SELECT>

<%-- <input type="text" name="dateFrom" id="dateFrom" class="select1" style=" margin-left: 34px;" /> --%>

<label for="dateTo">Date To</label>

<SELECT class="combine" id ="dd" name = "dd"></SELECT>

<SELECT class="combine" id ="mm" name = "mm"></SELECT>

<SELECT class="combine" id ="yy" name = "yyyy" ></SELECT>

<%-- <input type="text" name="dateTo" id="dateTo" class="select1" /> --%>

</div>

 

<input type="submit" name="buttonView" id="buttonViewReport" value="VIEW" onclick="validate();" class=" btn bt"/><br /> 

 

 

Thanks