With the drive mode button, shown on this picture, you can select single capture, sequential captures (up to 3 frames per second), or the self timer or remote shutter release.

Here's another useful technical review (choose 'Drive modes' in the contents list):

http://www.wrotniak.net/photo/43/e510-rev.html

PS: It's possible that you have to set the camera in full AUTO mode to use sequential shooting...

We do not see things as they are. ǝɹɐ ǝʍ sɐ sƃuıɥʇ ǝǝs ǝʍ