You may be able to do it if you're working with QlikView Mash-ups (Workbench). That way, you can build a customized webpage using QlikView Objects and adding some cool effects like changing cursor (using CSS).
However, I don't think this can be achieved in normal QV applications, unless you modifiy some of the CSS that are included in this path:
Those .css files are used for formatting inside QV Apps that are hosted in AccesPoint. However I've never tested if modifying this css files makes some effect in QV applications, but you can give it a try (don't forget to make backups of any file you modify in case something goes wrong),