I have been creating Crystal Reports which use 1 .rpt file and 1.jsp file. However some reports take a long time to load in the browser. Is there a way that I can use the .jsp file to change the mouse cursor?

I have read many articles already and bits of information seem to suggest doing it in JavaScript or in other languages but I only have a jsp file so how would I combine JavaScript and jsp? I want the mouse button to show the busy/waiting icon until when the report is fully loaded that way users can know that the browser is still processing. Is there a way to add a custom icon to display using jsp? Thanks for your help.