StringBuilder sb = new StringBuilder();
sb.Append("<script language=\"javascript\"> \n");
sb.Append("alert(\"" + str.Trim() + "\"); \n");
sb.Append("</script>");
System.Web.HttpContext.Current.Response.Write(sb.ToString());
如果要關閉目前頁面的話在script中間加入
"window.close();\n"
