Web. config [Ajax Script Error XXXX undefined] When IIS 7 uses Ajax. dll

Web. config needs to change when IIS 7 uses ajax. dll
This problem occurs because the IIS version of the server is IIS7. Therefore, you need to configure IIS6.
<System. webServer>
<Validation validateIntegratedModeConfiguration = "false"/>
<Modules>
<Remove name = "ScriptModule"/>
<Add name = "ScriptModule" preCondition = "managedHandler" type = "System. web. handlers. scriptModule, System. web. extensions, Version = 3.5.0.0, Culture = neutral, PublicKeyToken = 31BF3856AD364E35 "/>
</Modules>
<Handlers>
<Add name = "ajax" verb = "POST, GET" path = "ajax/*. ashx" type = "Ajax. PageHandlerFactory, Ajax"/>
<Remove name = "WebServiceHandlerFactory-Integrated"/>
<Remove name = "ScriptHandlerFactory"/>
<Remove name = "ScriptHandlerFactoryAppServices"/>
<Remove name = "ScriptResource"/>
<Add name = "ScriptHandlerFactory" verb = "*" path = "*. asmx "preCondition =" integratedMode "type =" System. web. script. services. scriptHandlerFactory, System. web. extensions, Version = 3.5.0.0, Culture = neutral, PublicKeyToken = 31BF3856AD364E35 "/>
<Add name = "ScriptHandlerFactoryAppServices" verb = "*" path = "* _ AppService. axd "preCondition =" integratedMode "type =" System. web. script. services. scriptHandlerFactory, System. web. extensions, Version = 3.5.0.0, Culture = neutral, PublicKeyToken = 31BF3856AD364E35 "/>
<Add name = "scriptresource" precondition = "integratedmode" verb = "Get, head" Path = "scriptresource. axd "type =" system. web. handlers. scriptresourcehandler, system. web. extensions, version = 3.5.0.0, culture = neutral, publickeytoken = 31bf3856ad364e35 "/>
</Handlers>
<Defadocument document>
<Files>
<Remove value = "default. aspx"/>
<Remove value = "iisstart.htm"/>
<Remove value = "index.html"/>
<Remove value = "index.htm"/>
<Remove value = "Default. asp"/>
<Remove value = "Default.htm"/>
<Add value = "login. aspx"/>
</Files>
</Defadocument document>
</System. webServer>

Most importantly
<Add name = "ajax" verb = "POST, GET" path = "ajax/*. ashx" type = "Ajax. PageHandlerFactory, Ajax"/>
In system. webServer