How does one randomize the position of a flash clip?!?!

The web-site is in html and I’m using a Flash Object layered over and image to create a circular-sonic-boom-effect when the page is loaded. Eg. The image in in a <td></td> with an absolute width of 233px and height of 310px. The flash object sits on top of the image and onLoad() invokes the flash ‘clip’. The clip is a circle, expanding and fading simultaneously. It’s initial position is x-100 and y-100. I’d like that the x and y positioning be random i.e on the next onLoad() the position should change to say x-134 and y-50.

Is there a way to do this?!?!
I respectfully request ANY advice.