I’m currently working on a project where we apply extensive jQuery to CRM 4.0. Our client requires a lot of UI-specific validations and business logic, mostly required on the front-end. Being a web developer I always try to shy away from traditional JavaScript when it comes to client-side programming.

Using jQuery makes life a whole lot easier in general and more so in CRM 4.0 considering the fact that you constantly need to manipulate the DOM to perform client-side tasks. Most of the simple tasks can be achieved by one line of code saving a lot of development time and improving overall productivty of the development team.

I strongly suggest that every development team working with CRM 4.0 invest in something like jQuery.