function centerMe( pWidth, pHeight)
{
	var sWidth = screen.width;
	var sHeight = screen.height;
	// this assumes your popup is smaller than the screen size...
	var popX = (sWidth / 2) - (pWidth / 2);
	var popY = (sHeight / 2) - (pHeight / 2);
	
	return 'left='+popX+',top='+popY;
}