Asp.net AJAX怎样在JavaScript中调用后台的方法?
听说Asp.net   AJAX不能通过JavaScript调用后台的方法,但我觉得不大可能, 
 因为ajaxpro都可以通过JavaScript调用后台的方法,Asp.net   AJAX为什么不能呢? 
 哪位大哥懂得Asp.net   AJAX通过JavaScript调用后台的方法请指点一下
------解决方案--------------------神呐,谁说滴 
 一,后台方法: 
 protected string CsharpVoid(string strCC) 
 { 
 return strCC; 
 } 
 javascript 调用 
  <script   language= "javascript ">  
    var s =  " <%=CsharpVoid( "www.hagen.cn ")%>  ";    
    document.write(s); 
  </script>    
 二,   
 1.后代码: 
 protected void CsharpVoid() 
      { 
          string strCC =  "www.hagen.cn "; 
          Response.Write(strCC); 
      }   
 2.调用方法:CsharpVoid() 
  <script   language= "javascript ">  
 document.write( " <%CsharpVoid();%>  "); 
  </script>    
 三,   
 把需要调用的函数写在服务器控件里,然后在javascript中加入 <img src= "/Images/None.gif " align=top> document.getElementById( "你控件ID ").click(); 
------解决方案--------------------Asp.net AJAX一般建议是调用webservice方法,而不是直接调用页面的方法
------解决方案--------------------javascript+webservice.htc 可以调用后台在webservice写的代码   
 可以搜索关键字 webservice   
 godgreat说的方法,也算吧,不过好象更似技巧
------解决方案--------------------最原始办法如下: 
 .aspx代码:   
  <%@ Page Language= "C# " AutoEventWireup= "true " CodeFile= "test1.aspx.cs " Inherits= "test1 " %>    
  <!DOCTYPE html PUBLIC  "-//W3C//DTD XHTML 1.0 Transitional//EN "  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">    
  <html xmlns= "http://www.w3.org/1999/xhtml " >  
  <head runat= "server ">  
      <title> 无标题页 </title>  
  </head>  
  <body>  
      <form id= "form1 " runat= "server ">  
          <asp:ScriptManager ID= "sm1 " runat= "server ">  </asp:ScriptManager>  
          <asp:TextBox ID= "txt_PostServerMethod " runat= "server " OnTextChanged= "txt_PostServerMethod_TextChanged " >  </asp:TextBox>  
          <input id= "btn_ExecMethod " onclick= "_do_ServerMethod(document.getElementById( 'txt_PostServerMethod ').value);_do_ClientMethod( 'red '); " type= "button " value= "调用后台方法 " />  
          <asp:UpdatePanel ID= "UpdatePanel1 " runat= "server " UpdateMode= "Conditional ">  
              <ContentTemplate>  
                  <div id= "div_Result " runat= "server ">  </div>  
              </ContentTemplate>  
              <Triggers>  
                  <asp:AsyncPostBackTrigger ControlID= "txt_PostServerMethod " EventName= "TextChanged " />  
              </Triggers>  
          </asp:UpdatePanel>  
      </form>  
  </body>  
  </html>  
  <script language= "javascript ">  
 /**************调用服务端方法*************/ 
 function _do_ServerMethod(ServerMethodName) 
 { 
     if(ServerMethodName!= " ") 
     { 
         __doPostBack( 'txt_PostServerMethod ', ' '); 
     } 
 } 
 /**************调用客户端方法*************/ 
 function _do_ClientMethod(color) 
 {alert( "客户端方法 ") 
     document.getElementById( 'div_Result ').style.color=color;