function hover( thumb, direction ) {
	if( direction == 'over' ) {
		thumb.style.opacity = 1;
		if( document.all )
			thumb.style.filter = 'alpha(opacity=100)';
		}
	else if( direction == 'out' ) {
		thumb.style.opacity = .15;
		if( document.all )
			thumb.style.filter = 'alpha(opacity=15)';
		}
	}