Flash MX 2004.
stroke.jiggle
Property; a string that specifies the jiggle property of a hatched line. This property is available only if the stroke.style property is set to hatched (see stroke.style). Acceptable values are "none", "bounce", "loose", and "wild".
The following example sets the jiggle property to wild for a stroke style of hatched:
var myStroke = fl.getDocumentDOM().getCustomStroke();
myStroke.style = "hatched";
myStroke.curve = "straight";
myStroke.space = "close";
myStroke.jiggle = "wild";
myStroke.rotate = "free";
myStroke.length = "slight";
myStroke.hatchThickness = "thin";
fl.getDocumentDOM().setCustomStroke(myStroke);