hiding direction markers on curves?

is there a way of hiding these direction arrow thingys on curve objects?
http://i938.photobucket.com/albums/ad229/0----Chris----0/random%20blends/arrows.jpg
my model has lots of curves and the direction thingys are making it difficult to see what i am doing!:confused:

Press N for properties panel. Under Curve Display turn off โ€˜Normalsโ€™

ha, brilliant, thanks Richard!