Ajax class undefined

After a very busy day, the Web. config settings are correct and all of them are registered. If everything is correct, '_ default' is always displayed.

The Ajax. dll and ajaxpro. DLL files have been changed several times, but this problem still persists,

That is, the class is undefined. After one day, the Internet finally found a solution:

1.

There is no runat = server form on the page, so it will not be generated during running.

<Input type = "hidden" name = "_ viewstate" value = "ddwxnzc3mdq0mza2ozs + zq2gjqhju5luu3gystmlne2cl/I ="/>
<SCRIPT type = "text/JavaScript" src = "/myhome/ajax/common. ashx"> </SCRIPT>

<SCRIPT type = "text/JavaScript" src = "/myhome/ajax/BR. myhome. admin. adminmyhome, Br. myhome. ashx"> </SCRIPT>
 

Without this code, he will not communicate with the server, resulting in such an error.