$(document).ready(function () {
        if ($("#ProductName").val().toString() == "") {
            $("#pricingSectionDisplay").hide;
            $("#pricingSectionProductName").val("");
        }
        else {
            $("#pricingSectionDisplay").show;
            $("#pricingSectionProductName").val($("#ProductName").val());
        }


        if ($("#PackSize").val().toString() == "") {
            $("#pricingSectionDisplay").hide;
            $("#pricingSectionPackSize").val("");
        }
        else {
            $("#pricingSectionDisplay").show;
            $("#pricingSectionPackSize").val($("#PackSize").val());
        }
    });

 function pricingSectionDisplay() {
        if ($("#ProductName").val().toString() == "") {
            $("#pricingSectionDisplay").hide;
            $("#pricingSectionProductName").val("");
        }
        else {
            $("#pricingSectionProductName").val($("#ProductName").val());
        }

        if ($("#PackSize").val().toString() == "") {
            $("#pricingSectionDisplay").hide;
            $("#pricingSectionPackSize").val("");
        }
        else {
            $("#pricingSectionPackSize").val($(PackSize).val());
        }
    }

@Html.TextBoxFor(m => m.ProductName, new { @class = "form-control", @id = "ProductName", onblur = "pricingSectionDisplay()" })

@Html.TextBoxFor(m => m.PackSize, new { @class = "form-control", @id = "PackSize", onblur = "pricingSectionDisplay()" })

$("#pricingSectionDisplay").hide;

$("#pricingSectionDisplay").hide();

@Html.TextBoxFor(m => m.ProductName,
     new { @class = "form-control", id = "ProductName",
      onblur = "pricingSectionDisplay()" })

@Html.TextBoxFor(m => m.ProductName,
              new { @id = "ProductName",
                    onblur = "pricingSectionDisplay()" })