function initPage(myId,myLeft,myRight){
	
	var _gallery = myId;
	var _leftArrow = myLeft;
	var _rightArrow = myRight;
	// largeur d'un li + margin
	var _step = 50;
	var _duration = 1800;
	// largeur de #gallery-content
	var _gWidth = 650;
	
	var _liSum = $(_gallery).getElements('li').length * _step;
	var _margin = 0;
	var f = 0;
	
	$(_rightArrow).addEvent('click', function(){
		var morphfxs = new Fx.Morph($(_gallery).getElement('ul'), {duration: 'long', transition: Fx.Transitions.Sine.easeOut});
		if (_liSum - _gWidth  <= _margin + _step) {
				if (f == 0) {
					_margin = _liSum - _gWidth
					f = 1;
				} else {
					_margin = 0;
					f = 0
				}
			}
		else _margin = _margin + _step;
		morphfxs.start({
			'margin-left': -_margin
		});
		return false;
	});
	
	
	$(_leftArrow).addEvent('click', function(){
		var morphfxs = new Fx.Morph($(_gallery).getElement('ul'), {duration: 'long', transition: Fx.Transitions.Sine.easeOut});
			_margin = _margin - _step;
			if (_margin < 0) _margin = 0;
			morphfxs.start({
			'margin-left': -_margin
			});
		return false;
	});
}