準備好Server端的方法
[System.Web.Services.WebMethod] public static string VeryUserName(string name) { string rtn = "恭喜,此帳號還沒有註冊,你可以使用。"; if (name == "") rtn = "請填寫一個註冊帳號。"; if (name == "Insus.NET") rtn = "此使用者已經註冊,請使用另外帳號。"; return rtn; } HTML代碼:<asp:TextBox ID="TextBoxAccount" runat="server"></asp:TextBox><br /> <input id="btnrReg" type="button" value="註冊" onclick="VeryRegAccount()" />Javascript指令碼:View Code <script src="scripts/jquery-1.3.2.min.js" type="text/javascript"></script> <script type="text/javascript"> function VeryRegAccount() { $.ajax({ type: "POST", url: "Default.aspx/VeryUserName", data: '{name: "' + $("#<%= TextBoxAccount.ClientID%>")[0].value + '" }', contentType: "application/json; charset=utf-8", dataType: "json", success: OnSuccess, failure: function (response) { alert(response.d); } }); } function OnSuccess(response) { alert(response.d); } </script>