create javascript array from code behind

SiteServices siteServiceobj = new SiteServices();
            List<Site> siteList = siteServiceobj.GetAllSites(2);
            List<string> latLongList = (from site in siteList select "'" + site.NominalLat.ToString() + "," + site.NominalLong.ToString() + "'").ToList<string>();
            var geocodevalues = string.Join(",", latLongList.ToArray());
            List<string> OmessageList = (from site in siteList select "'<span class=formatText >" + site.SiteName + "!!!</span>'").ToList<string>();
            String message = string.Join(",", OmessageList.ToArray());

            ClientScript.RegisterArrayDeclaration("locationList", geocodevalues);

            ClientScript.RegisterArrayDeclaration("message", message);

<script type="text/javascript">
       function alertfunction() {

           alert(locationList);
           alert(message);


       }
       window.onload = alertfunction;
    </script>

tionList