window.addEvent('domready', function() {
///fomularoio opinar	
var m = $('mainImg');		
var x = 1;
var pBackground;
function backgroundChange()
{
    pBackground = 'IMAGES/contenidos/portada/portada' + x + ".jpg";
	x++
	if(x>6){ x=1;}
    var fx = new Fx.Tween(m,{
        duration: 1500,
        onComplete: function(){ 
                m.setStyle('background-image','url(' + pBackground + ')');
                m.fade('in');
        }
    });
    fx.start('opacity',1,0);
}
var periodicalFunctionVar = backgroundChange.periodical(6000);
});