1）ScriptManager的EnablePageMethods属性用于设定客户端javascript直接调用服务端静态WebMethod
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods=true>
</asp:ScriptManager>
</asp:ScriptManager>
[System.Web.Services.WebMethod] public static String SayHello(string name) 
{ 
return "welcome to site " + name; 
}