$(function() {

    $(".msgBtn").click(function() {

        var isValid = true;

        if (!$("#startDate").valid()) {
            isValid = false;
        }
        if (!$("#endDate").valid()) {
            isValid = false;
        }

        if (!isValid)
            return;

        $("form#csr-message").submit(); //save button
    });
             });
$.validator.addMethod(
                "formatdata",
                function(value, element) {
                    var i = /(?:0[1-9]|[12][0-9]|3[01]).(?:0[1-9]|1[0-2]).(?:19dd|20dd)/;
                    return this.optional(element) || i.test(value);
                }, "Incorrect format data");

var validator = $("#csr-message")
        .validate(
                {
                    rules : {
                        startDate : {
                            formatdata : true

                        },
                        endDate : {
                            formatdata : true
                        }
                    },
                    messages : {
                        startDate : {
                            formatdata : jQuery
                                    .format("Start date has incorrect format!"),
                        },
                        endDate : {
                            formatdata : jQuery
                                    .format("End date has incorrect format!"),
                        }
                    }
                }

$(function () {
    $.datepicker.setDefaults({
        dateFormat: 'dd/mm/yy'
    });
});

Then to bind it to the input element:
$(function () {
    $("#StartDate").datepicker();
});

$(document).ready(function () {
       $('#btn_move').click( function(){
           var dateformat = /^(0?[1-9]|[12][0-9]|3[01])[/-](0?[1-9]|1[012])[/-]d{4}$/;
           var Val_date=$('#txt_date').val();
               if(Val_date.match(dateformat)){
              var seperator1 = Val_date.split('/');
              var seperator2 = Val_date.split('-');

              if (seperator1.length>1)
              {
                  var splitdate = Val_date.split('/');
              }
              else if (seperator2.length>1)
              {
                  var splitdate = Val_date.split('-');
              }
              var dd = parseInt(splitdate[0]);
              var mm  = parseInt(splitdate[1]);
              var yy = parseInt(splitdate[2]);
              var ListofDays = [31,28,31,30,31,30,31,31,30,31,30,31];
              if (mm==1 || mm>2)
              {
                  if (dd>ListofDays[mm-1])
                  {
                      alert('Invalid date format!');
                      return false;
                  }
              }
              if (mm==2)
              {
                  var lyear = false;
                  if ( (!(yy % 4) && yy % 100) || !(yy % 400))
                  {
                      lyear = true;
                  }
                  if ((lyear==false) && (dd>=29))
                  {
                      alert('Invalid date format!');
                      return false;
                  }
                  if ((lyear==true) && (dd>29))
                  {
                      alert('Invalid date format!');
                      return false;
                  }
              }
          }
          else
          {
              alert("Invalid date format!");

              return false;
          }
       });
   });