var myTimer;
var activa = 0;
var efectos = new Array();

function inicia(){

	var images = $$('.fotoPresent');

	images.each(function(img, i){
		if(i==0){
			efectos[i] = img.effect('opacity', {duration: 500, transition: Fx.Transitions.linear});
		}else{
			efectos[i] = img.effect('opacity', {duration: 500, transition: Fx.Transitions.linear}).set(0);
		}
		img.setStyle('position', 'absolute');
		img.setStyle('left', '0px');
		img.setStyle('top', '0px');
	});

	myTimer = cambiaImg.periodical(7000);
} 
function cambiaImg(){
	var images = $$('.fotoPresent');
	
	if(activa!=images.length-1){
		efectos[activa].start(1,0);
		efectos[activa+1].start(0,1);
		activa += 1;
	}else{
		efectos[activa].start(1,0);
		efectos[0].start(0,1);
		activa = 0;
	}

}
/* -----------------------------------------------------------------------------
LOAD ---------------------------------------------------------------
----------------------------------------------------------------------------- */ 
window.addEvent('load', inicia);