>Don't understand the question. If the type is Int16 then it's Int16 - where does decimal come into it ?
>
I solved this way:

 @if (ViewData.ModelMetadata.ModelType.IsNumeric())
   {
    <input type="number" id=@ViewData.ModelMetadata.PropertyName name=@ViewData.ModelMetadata.PropertyName class="numericOnly" value=@Model  />
   }
    else
    {
     @Html.TextBox("", (object)Model,
        new Dictionary<string, object>
            {
                { "id", ViewData.ModelMetadata.PropertyName },
                { "name", ViewData.ModelMetadata.PropertyName },
                { "class", "text-box single-line"},
                { "data-bind", "value: " + ViewData.ModelMetadata.PropertyName },
            })
    }

where IsNumeric was an extension method based on the last message in this thread
http://social.msdn.microsoft.com/Forums/en-US/csharplanguage/thread/66a7dc8d-f276-4d45-8da4-f8d9857db52c/