public static void calculate(string par)
{
string cleanMessage = par.Replace("'", "\\'");
string script = string.Format("<script type=\"text/javascript\">$(document).ready(function(){JA('{0}');});</script>", cleanMessage);
Page page = HttpContext.Current.CurrentHandler as Page;
if (page != null && !page.ClientScript.IsClientScriptBlockRegistered("JA"))
{
page.ClientScript.RegisterClientScriptBlock(typeof(<your class="" name="">), "JA", script);
}
}</your>