Specifies how the text scrolls in the marquee.
object.behavior[ = behavior]
Possible values include:
alternate The marquee alternates left and right. scroll The marquee is a scrolling marquee in the direction specified by the direction property. The text scrolls off the end and starts over. slide The marquee is a scrolling marquee in the direction specified by the direction attribute. The text scrolls to the end and stops.
This property has read-write permissions, meaning you can change as well as retrieve its current value.