If a page tries to load jQuery twice, it will fail to run without a warning. So, make sure that jQuery is specified in the Master page, but not in the specific page you need.

The same thing may happen if maskedinput is specified twice.

One other thing. I tried using that same jquery library but it would blank out the field and the value once you tab out of it. In my search for another library, I found several forum posts indicating that masked input is very problematic and several people just gave up.


>I am trying to incorporate into my project a masked input plug-in (URL: http://digitalbush.com/projects/masked-input-plugin/)
>
>When I add this .js
>

><script src="Scripts/jquery-1.7.1.js" type="text/javascript"></script>
><script src="Scripts/jquery.maskedinput-1.2.2.min.js" type="text/javascript"></script>
>

>to a separate .aspx file in my project, the mask() function works very well.
>
>But when I add it to a page that uses Master page, I get error:
>

>0x800a01b6 - Microsoft JScript runtime error: Object doesn't support property or method 'mask'
>

>
>The test code is identical in separate test page and the page that uses master page:
>
>

> <script type="text/javascript">
>        $(document).ready(function () {
>             $("#txtPhoneNumber").mask("(999) 9999-9999");
>        })
>    </script>
>

>
>The error (above) happens on the line .mask() above.
>
>How would you recommend to debug this situation? TIA