function calculateAgeLatest (birthday, dateToCalculate) {
    var calculateYear = dateToCalculate.getFullYear();
    var calculateMonth = dateToCalculate.getMonth();
    var calculateDay = dateToCalculate.getDate();

    var dateOfBirth = new Date(birthday);
    var birthYear = dateOfBirth.getFullYear();
    var birthMonth = dateOfBirth.getMonth();
    var birthDay = dateOfBirth.getDate();

    var age = calculateYear - birthYear;
    var ageMonth = calculateMonth - birthMonth;
    var ageDay = calculateDay - birthDay;

    if (ageMonth < 0 || (ageMonth == 0 && ageDay < 0)) {
        age = parseInt(age) - 1;
    }
    return age;
}


function addAgeValidator(fieldName) {

    if (typeof (Page_Validators) == 'undefined') return;
    // Create new validator
    $("#" + fieldName + "_label").parent().addClass("required");

    var newValidator = document.createElement('span');
    newValidator.style.display = "none";
    newValidator.id = "RequiredFieldValidator" + fieldName;
    newValidator.controltovalidate = "casetypecode";
    newValidator.errormessage = "<a href='#" + fieldName + "_label'>Date of birth can't be in the future</a>";
    newValidator.validationGroup = "";
    newValidator.initialvalue = "";
    newValidator.evaluationfunction = function () {
        //var value = $("#" + fieldName).val();
        
		var birthdate = $("#" + fieldName).val();
		var todaysdate = new Date();
		
		var dateOfBirth = new Date(birthdate);
		if (dateOfBirth > todaysdate) {
            return false;
        } else {
            return true;
        }
		
		//if (calculateAgeLatest(birthdate,new Date()) < 1) {
           // return false;
        //} else {
           // return true;
        //}
    };

    // Add the new validator to the page validators array:
    Page_Validators.push(newValidator);

    // Wire-up the click event handler of the validation summary link
    $("a[href='#" + fieldName + "_label']").on("click", function () { scrollToAndFocus(fieldName + '_label', fieldName); });
}


function addValidator(fieldName, fieldLabel) {


    if (typeof (Page_Validators) == 'undefined') return;
    // Create new validator
    $("#" + fieldName + "_label").parent().addClass("required");

    var newValidator = document.createElement('span');
    newValidator.style.display = "none";
    newValidator.id = "RequiredFieldValidator" + fieldName;
    newValidator.controltovalidate = "casetypecode";
    newValidator.errormessage = "<a href='#" + fieldName + "_label'>" + fieldLabel + " is a mandatory field.</a>";
    newValidator.validationGroup = "";
    newValidator.initialvalue = "";
    newValidator.evaluationfunction = function () {
        var value = $("#" + fieldName).val();
        if (value == null || value == "") {
            return false;
        } else {
            return true;
        }
    };

    // Add the new validator to the page validators array:
    Page_Validators.push(newValidator);

    // Wire-up the click event handler of the validation summary link
    $("a[href='#" + fieldName + "_label']").on("click", function () { scrollToAndFocus(fieldName + '_label', fieldName); });
}

function removeValidator(fieldName) {
    $.each(Page_Validators, function (index, validator) {
        if (validator.id == "RequiredFieldValidator" + fieldName) {
            Page_Validators.splice(index, 1);
        }
   });

    $("#" + fieldName + "_label").parent().removeClass("required");
}


//add validator to make sure date of birth is a realistic
addAgeValidator('citb_dob');

var birthdate = $('#citb_dob').val();
if (birthdate && calculateAgeLatest(birthdate,new Date()) < 18) {
    $("label[for='citb_parentguardingname']").parent().attr('class', 'info required');
    addValidator('citb_parentguardingname', 'Parent Guardian Name');
    $("label[for='citb_relationshiptocarer']").parent().attr('class', 'info required');
    addValidator('citb_relationshiptocarer', 'Relationship to Carer');
}
else {
    $('#citb_parentguardingname').css('display', 'none');
    $("label[for='citb_parentguardingname']").css('display', 'none');
    $('#citb_relationshiptocarer').css('display', 'none');
    $("label[for='citb_relationshiptocarer']").css('display', 'none');
     }


// this is triggered once date of birth is changed
var dpcontrol = $('div.control')[5];
$(dpcontrol).on("dp.change", function (e) {
	 var birthdate = e.date;
	
	var age = calculateAgeLatest(birthdate,new Date());
	if (age < 18) {
		$("label[for='citb_parentguardingname']").parent().attr('class', 'info required');
		addValidator('citb_parentguardingname', 'Parent Guardian Name');
		$("label[for='citb_relationshiptocarer']").parent().attr('class', 'info required');
		addValidator('citb_relationshiptocarer', 'Relationship to Carer');
		$('#citb_parentguardingname').css('display', '');
		$("label[for='citb_parentguardingname']").css('display', '');
		$('#citb_relationshiptocarer').css('display', '');
		$("label[for='citb_relationshiptocarer']").css('display', '');
	}
	else {
				 removeValidator('citb_relationshiptocarer');
				$('#citb_parentguardingname').css('display', 'none');
				$("label[for='citb_parentguardingname']").css('display', 'none');
				 removeValidator('citb_parentguardingname');
				$('#citb_relationshiptocarer').css('display', 'none');
				$("label[for='citb_relationshiptocarer']").css('display', 'none');
				
		 }
});