Tooltip is a very nice feature in ASP.NET for displaying additional information when hovering mouse over an item, but the problem with tooltip is that it will go away after about 2 seconds and you will have to move your mouse away and move back to make it appear again. You don’t have any option to change the duration of the display either. It really irritates me for not being able to keep the tooltip to stay longer, if not stay all the time. The good news is there is an alternative: using Cool DHTML Tooltip II from Dynamic Drive. This tooltip is easy to use and to configure, and I have used in several projects and really like it. Go check it out yourself.