Javascript Validation

1. http://www.webdevelopmenthelp.net/2013/02/JavaScript-Validating-Input.html

ASP.NET Validation Control

2. http://www.codeproject.com/Articles/49527/How-to-Use-the-ASP-NET-Validation-Control-to-Valid

3. http://aspdotnetcode.blogspot.in/2010/09/aspnet-validation-controls-with-example.html

4. http://www.c-sharpcorner.com/UploadFile/anandn_mvp/aspnetvalidationcontrols06202006021425AM/aspnetvalidationcontrols.aspx

5. http://dotnetprof.blogspot.in/2012/03/validation-controls-in-aspnet.html

6. http://www.tutorialspoint.com/asp.net/asp.net_validators.htm

7. http://www.devmanuals.com/tutorials/ms/aspdotnet/validationsummary.html

// general Dotnet
8. http://dotnetstation.wordpress.com/validation-summary-example-validation-summary-control-in-aspnet/

Calendar Control 

9. http://www.aspdotnet-suresh.com/2012/06/ajax-calendar-extender-control-example.html