Fill The database column on click of an Image

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MVC3

ASP.NET4

I have this code in my Home controller index action and in the index view I have put an image and linked it to some where like Employee Page.
What I need is simple if I click on the image then my column of DB CheckInTime and CheckOutTime filled by current time as written in the code.

What should I do next?

Thank you.

public ActionResult Index()
            {
                  ViewBag.Message = "Welcome to ZDAAS LLC";
                  EmployeeContext empDB = new EmployeeContext();
                  Employee emp = new Employee();
                  emp.CheckInTime = System.DateTime.Now;
                  emp.CheckOutTime = System.DateTime.Now;
                  
                  return View();
            }