var next = true;

window.addEvent('domready', function(){
	var scroll = new Fx.Scroll('tab_outter', {
		wait: false,
		duration: 500,
		offset: {'x': 0, 'y': 0},
		transition: Fx.Transitions.linear
	});
			
	$('link1').addEvent('click', function(event) {
		event = new Event(event).stop();
		if (next == false) {
			event = new Fx.Style('page2', 'opacity', {duration: 500}).start(1,0);
			event = new Fx.Style('page1', 'opacity', {duration: 500}).start(0,1);
		}
		next = true;
		scroll.toElement('page1');
	});
	
	$('link2').addEvent('click', function(event) {
		event = new Event(event).stop();
		if (next == true) {
			event = new Fx.Style('page1', 'opacity', {duration: 500}).start(1,0);
			event = new Fx.Style('page2', 'opacity', {duration: 500}).start(0,1);
		}
		next = false;
		scroll.toElement('page2');
	});
});