function ligarSlideshow(id){
	
	
	  var showDuration = 3000 + Math.random()*2000;
	  var container = $(id);
	  var images = container.getElements('img');
	  var currentIndex = 0;
	  var interval;
	  /* opacity and fade */
	  images.each(function(img,i){ 
		if(i > 0) {
		  img.set('opacity',0);
		}
	  });
	  /* worker */
	  var show = function() {
		images[currentIndex].fade('out');
		images[currentIndex = currentIndex < images.length - 1 ? currentIndex+1 : 0].fade('in');
	  };
	  /* start once the page is finished loading */
	  window.addEvent('load',function(){
		interval = show.periodical(showDuration);
	  });
	  
	
		
}