使用Ajax在客户端调用服务端函数并传值

protected void Page_Load(object sender, EventArgs e)
[AjaxPro.AjaxMethod]
public string IsRight(string useName,string pwd)
private bool IsExist(string useName,string pwd)
<script language="javascript" type="text/javascript">

function CheckUser()

function IsUserExist(res)

</script>
<form id="form1" runat="server">
<div>
<div style="z-index: 101; left: 107px; width: 482px; position: absolute; top: 99px;
height: 177px">
<asp:Label ID="Label1" runat="server" Text="用户名："></asp:Label>
<asp:TextBox ID="useName" runat="server"></asp:TextBox><br />
<br />
<asp:Label ID="Label2" runat="server" Text="密 码：" Width="64px"></asp:Label>
<asp:TextBox ID="usePwd" runat="server"></asp:TextBox><br />
<br />
<input id="Button1" type="button" value="登陆" language="javascript" onclick="return Button1_onclick()"/>

<input id="Reset1" type="reset" value="reset" language="javascript"/><br />
<br />
 <input id="Msg" type="text" /><br />
<asp:Label ID="Lb" runat="server" Text="Label"></asp:Label></div>

</div>
</form>