This is a followup to my previous post about How to get the Entity Type Code in CRM 2011. While that method works, it requires you to go to a page and manually get the type code for the entity. What we really need is a way through script to get the entity type [...]

In CRM 4.0 you can get the ObjectTypeCode by using crmForm.ObjectTypeCode. Unfortunately, in CRM 2011 there is no explicit method in the Xrm namespace that returns the EntityTypeCode/ObjectTypeCode.  However, you can easily get the EntityTypeCode by using the Xrm.Page.context.getQueryStringParameters() method. This method will return an object with properties for each parameter in the query string. [...]