This is a small very technical tip. It has been documented elsewhere. However, today I came across someone who did not know and, therefore, I decided to write it here.
If you are developing XPages using IBM Domino Designer from time to time you may want to stop the loading of the "fat" Dojo libraries. You may have decided to use jQuery Mobile for your mobile solution (as I do for a mobile app). On the other hand you may not want to disable Dojo for the entire application (in the xsp.properties file). So what do you do?
You can add the following SSJS code to the beforePageLoad event of your XPage:
facesContext.getRequestParameters().setJsLibrary(0);
... and you are done!