Writing client side javascript to validate date.

Problem:

I was working with my project were I got stuck where I want to work with DATE data type at client side. When I click button I need to perform custom validation that validates the date entered by the user. I want to do this task using client side script.

Impact:

If you don’t use javascript then you have to use server side custom function. But then you are sending the request to server for validation.

Solution:

Use client side javascript function and make use of Date functionality available in it. Here the checkDate is the Function.

<script language="javascript"  type="text/javascript">

    function checkDate(sender, arguments) {

        //get the current date

        var tdate = new Date();

       

        //get year from current date

        var tyear = tdate.getFullYear();

        
        // Splits the date entered by userand gets in form of array

        // which contains date,month and year

       var cdate = arguments.Value.split('/');

               

        //check if age is greater than 18 and less than 90

        if ((tyear - cdate[2] > 18) && (tyear - cdate[2] < 90)) {

             //mark page as valid

             arguments.IsValid = true;

        }

        else {

            //mark page as invalid

            arguments.IsValid = false;

        }

    }

</script>

<asp:CustomValidator ID="CalendarCustomValidator"   runat="server" ControlToValidate="ShowDOB_label" 

ClientValidationFunction="checkDate"

Text="Age must be greater that 18 and less than 90">

</asp:CustomValidator>