//CompressJs
        public static string CompressJs(this HtmlHelper html, UrlHelper url)
        {
            StringBuilder builder = html.ViewData[keyForScript] as StringBuilder;

            if (builder == null || String.IsNullOrEmpty(builder.ToString()))
            {
                return(String.Empty);
            }
            return(string.Format(@"<script type=""text/javascript"" src=""{0}"" ></script>", AppHelper.CompressScriptForFiles(builder.ToString())));
        }