javascript - Date Validation for Birth Date, Joining Date and Leaving Date

Question

I have three textboxes for BirthDate, JoiningDate & LeavingDate.

Now what I want is:-

1. Joining date and Leaving date should not be greater than Birthdate

2. Leaving Date should not be greater than Joining Date and BirthDate

I have used the DatePicker.

Here is the JS code:-

$(function () {
        $("[id$=mainContent_txtdateofbirth], [id$=mainContent_txtdoj], [id$=mainContent_txtdol]").datepicker({
            textboxImageOnly: true,
            textboxImage: 'images/calendar.png',
            changeMonth: true,
            changeYear: true,
            dateFormat: "yy / mm / dd",
            yearRange: "-40:+0",
            maxDate: new Date(),
        });
    });

The three textboxes are:-

<asp:TextBox ID="txtdateofbirth" CssClass="form-control" runat="server" ValidationGroup="AddNew"></asp:TextBox>
    <asp:TextBox ID="txtdoj" CssClass="form-control" runat="server" ValidationGroup="AddNew"></asp:TextBox>
    <asp:TextBox ID="txtdol" CssClass="form-control" runat="server" ValidationGroup="AddNew"></asp:TextBox>

UPDATED ASPX CODE:-

<tr>
        <td style="vertical-align: top;">
            <label class="control-label" for="dob">Date of Birth</label></td>
        <td>
            <div class="control-group">
                <div class="controls">
                    <asp:TextBox ID="txtdateofbirth" CssClass="form-control" autocomplete="off" runat="server" ValidationGroup="AddNew"></asp:TextBox>
                    <asp:RequiredFieldValidator ID="reqdob" runat="server" CssClass="error-class" ControlToValidate="txtdateofbirth" ErrorMessage="Please select the date of birth" ValidationGroup="AddNew"></asp:RequiredFieldValidator>
                </div>
            </div>
        </td>
    </tr>
    <tr>
        <td style="vertical-align: top;">
            <label class="control-label" for="subject">Date of Join</label></td>
        <td>
            <div class="control-group">
                <div class="controls">
                    <asp:TextBox ID="txtdoj" Wrap="true" CssClass="form-control" autocomplete="off" runat="server" ValidationGroup="AddNew"></asp:TextBox>
                    <asp:RequiredFieldValidator ID="reqdoj" CssClass="error-class" runat="server" ControlToValidate="txtdoj" ErrorMessage="Please add the date of joining" ValidationGroup="AddNew"></asp:RequiredFieldValidator>
                </div>
            </div>
        </td>
    </tr>

    <tr>
        <td style="vertical-align: top;">
            <label class="control-label" for="subject">Date of Leaving</label></td>
        <td>
            <div class="control-group">
                <div class="controls">
                    <asp:TextBox ID="txtdol" CssClass="form-control" autocomplete="off" runat="server" ValidationGroup="AddNew"></asp:TextBox>
                </div>
            </div>
        </td>
    </tr>

Answer 1

Demo

Validation function

var validateData = function () {
    var bday = $('#birthdate').val();
    var jday = $('#joiningdate').val();
    var lday = $('#leavingdate').val();

    if (bday && jday && bday > jday) {return}
    if (bday && lday && bday > lday) {return}
    if (jday && lday && jday > lday) {return}

    return true;
};

is called onClose event of datepicker, after what error message can be displayed. Feel free to change error displaying method.

    onClose: function () {
        validateData() ? $('#errormsg').hide() : $('#errormsg').show();
    }

Update

To add some css to error message add class to it like

<div id="errormsg" class="error-msg">Invalid date</div>

And then you can move display: none; to your css

Update

Demo for required fields