<a id="submitBtn" onclick="ShowTripUpdateValidationError(); TripUpdateSubmit();" class="btn blueButton" style="margin-top: 10px;"><span>&nbsp;&nbsp;Submit</span></a>

function ShowTripUpdateValidationError() {
        if (!$("#SupplierBookingUpdateSave").valid())
            $("#errorDiv").css("display", "block");
        else
            $("#errorDiv").css("display", "none");
    }

    function TripUpdateSubmit() {
        $("#SupplierBookingUpdateSave").submit();
    }

<td>@Html.EditorFor(m => m.ActualLoadDate, new { @id = loadActualDateId } )</td>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

[HttpPost]
        public ActionResult TripUpdate(TripUpdateModel model)
        {
            if (ModelState.IsValid)
            {
                
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }