If you only care about IE such as inside corporate intranet, and never had to worry about cross browser compatibility, knock yourself out. On the other hand, th

If you only care about IE such as inside corporate intranet, and never had to worry about cross browser compatibility, knock yourself out. On the other hand, the scalablity and performance on the intranet usually are not a high priority. Why not just learn jQuery rather than tight yourself up to vender specific, proprietary technology?