How to use validation in jquery calendaer

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hear is my code given below--
<script type="text/javascript">
$(document).ready(function () {
$("#txtaddDateOfIssue").datepicker({
// maxDate: "-18Y"
dateFormat: 'dd/M/yy'
, changeMonth: true
, changeYear: true
});
BulkMethodCall();

var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_endRequest(function () {
BulkMethodCall();

});

function BulkMethodCall() {
$('.googleJqueryDate').datepicker({
dateFormat: 'dd/M/yy'
, changeMonth: true
, changeYear: true
//, yearRange: "-50:+0"
, minDate: 0

, onSelect: function (date, inst) {
if (inst.id == "ctl00_content_txtaddDateOfReturn") {

if ($('#ctl00_content_txtaddDateOfIssue').val() == "") {
$('#ctl00_content_txtaddDateOfReturn').val("");
alert('Please Choose From Date First!');
}
else {
var StartDate = $('#ctl00_content_txtaddDateOfIssue').val();
var EndDate = $('#ctl00_content_txtaddDateOfReturn').val();

var dt1 = parseInt(StartDate.substring(0, 2), 10);
var mon1 = StartDate.substring(3, 6);
var yr1 = parseInt(StartDate.substring(7, 11), 10);
var StartdateNew = new Date(yr1, GetMonthValue(mon1) - 1, dt1);

var BTDate1 = parseInt(EndDate.substring(0, 2), 10);
var BTMon1 = EndDate.substring(3, 6);
var BTYear1 = parseInt(EndDate.substring(7, 11), 10);
var EndDateNew = new Date(BTYear1, GetMonthValue(BTMon1) - 1, BTDate1);

if (EndDateNew < StartdateNew) {
alert('Leave End Date can not be earlier than Leave Start Date!');
$(this).val("");
}
}
}
else {
$('#ctl00_content_txtaddDateOfReturn').val("");
}
}
});

function GetMonthValue(monthname) {
var monthvalue;
switch (monthname) {
case "Jan": monthvalue = 1; break;
case "Feb": monthvalue = 2; break;
case "Mar": monthvalue = 3; break;
case "Apr": monthvalue = 4; break;
case "May": monthvalue = 5; break;
case "Jun": monthvalue = 6; break;
case "Jul": monthvalue = 7; break;
case "Aug": monthvalue = 8; break;
case "Sep": monthvalue = 9; break;
case "Oct": monthvalue = 10; break;
case "Nov": monthvalue = 11; break;
case "Dec": monthvalue = 12; break;
}
return monthvalue;
}

$('.googleJqueryDate').attr("placeholder", "dd/MM/yyyy");
$('.googleJqueryDate').attr("onkeyup", "return false;");
$('.googleJqueryDate').attr("onkeydown", "return false;");
$('.googleJqueryDate').attr("onPaste", "return false;");

}
});
</script>

What I have tried:

i want to try when i click one text and select daten then if i click next text then it will show you cant select minimum date

please help me

Posted 4-Mar-16 19:37pm

Member 12183079

Updated 5-Mar-16 1:44am

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Peter Leow · Answer 1 · 2016-03-05T01:44:00

Use code to manipulate the behaviors of the todate and fromdate datepickers as follows:
1. Enable the todate datepicker only when there is a selected date in the fromdate datepicker.
2. Set the min date for the todate datepicker to the selected date of the fromdate datepicker.
For example:

  <script>
  $(function() {
    
    var $from = $("#from");
    var $to = $("#to");

    $to.datepicker({disabled:true});
					   
    $from.datepicker({
      onClose: function( selectedDate ) {
          $to.datepicker( "option", "disabled", selectedDate == "" );
	  $to.val(selectedDate);
	  $to.datepicker( "option", "minDate", selectedDate );
      }
    });
    $to.datepicker({
      onClose: function( selectedDate ) {
        $from.datepicker( "option", "maxDate", selectedDate );
      }
    });
  });
  </script>
</head>
<body>
 
<label for="from">From</label>
<input type="text" id="from" name="from">
<label for="to">to</label>
<input type="text" id="to" name="to">
 
 
</body>