These are common jquery errors when playing with jquery in dynamics CRM 2011:
jquery Access Denied
When running the jquery script on a machine outside the development domain you get:
<CrmScriptErrorReport>
<ReportVersion>1.0</ReportVersion>
<ScriptErrorDetails>
<Message>Access is denied.
</Message>
<Line>140</Line>
>To resolve this, add the site URL to one of the IE zones and enable the following setting for that zone: