actionscript help

hi

i am pretty new to actionscript programming and am having some issues.

import flash.display.MovieClip;


mybox.addEventListener(MouseEvent.MOUSE_OVER,position);


function position():void {
	mybox.x = 0;
}

can someone tell me what is wrong with this code?

when i run it i get this

ArgumentError: Error #1063: Argument count mismatch on flash_fla::MainTimeline/position(). Expected 0, got 1.


any help would be appreciated.

try:

function position(event):void {
	mybox.x = 0;
}

thnx