Type is undefined MVC AJAX Script

Question

on one page of my app i get a Type is undefined on the ajax script. why would this be?

EDIT

Type is not defined MicrosoftMvcAjax.js()()Microsof...vcAjax.js (line 6) [Break on this error] Type.registerNamespace('Sys.Mvc');Sys.Mv...reate_AjaxOptions=function(){return {};}

Answer 1

You can start off by installing Firebug for Firefox - it will give you a better error message complete with a call stack.

Sounds like you are trying to instantiate something that is not defined, perhaps you didn't include a javascript file?

Answer 2

I was getting this - 'Type' is undefined. Igor Zeveka gave a nice hint and it worked for me. 'Type' class is defined in MS AJAX library. I was referencing my custom.js file in my html head section. Looks like that was causing this reference issue. I moved my custom.js reference inside section of ScriptManager.

 <asp:ScriptManager ID="ScriptManager1" runat="server">
   <Scripts>       
       <asp:ScriptReference Path="~/MyJscripts/custom.js"  />
   </Scripts>
</asp:ScriptManager>

Answer 3

You have to add a reference to MicrosoftAjax.js as well

<script src="../../Scripts/MicrosoftAjax.js" type="text/javascript"></script>