function setOpacity_banner(value,img,sentido){
 var objeto= document.getElementById('slider').getElementsByTagName('li');
if (sentido==0){
 objeto[img].style.opacity = value/10;
 objeto[img].style.filter = 'alpha(opacity=' + value*10 + ')';
} else {
 value = 10 - value;
 objeto[img].style.opacity = value/10;
 objeto[img].style.filter = 'alpha(opacity=' + value*10 + ')';
   } 
  if(value==0 && sentido == 0){
   cambiardisplay(objeto[img],'block');
  }
  if(value==0 && sentido == 1){
   cambiardisplay(objeto[img],'none');
	}
}
function cambiardisplay(elem,tipo){
	elem.style.display = tipo;
}

function cambio(i){ 
 var isig=i+1;
 if (isig==5){isig=0;}
     var k=0;
 	var objeto= document.getElementById('slider').getElementsByTagName('li');
        for (var op=0;op<=10;op++){
	           setTimeout('setOpacity_banner('+op+','+i+',1)',100*k);
               setTimeout('setOpacity_banner('+op+','+isig+',0)',100*k);
	           k=k+1;
        }
 	setTimeout("cambio("+isig+")",5000);
}
 setTimeout("cambio(0)",5000);