function opacity(oElement){

if(oElement.filters){

oElement.style.filter = 'alpha(opacity='+iTransp+')'
iTransp ++;
var iInterval = 1;
}else{
oElement.style.opacity = fTransp; 
fTransp =  fTransp + 0.1;
var iInterval = 50; 
}

fnOpacity = function(){
opacity(oElement)
}

if(iTransp < 100 && fTransp < 1)
{
var iTimer = setTimeout(fnOpacity,iInterval);
}else{
clearTimeout(iTimer);
}
}


aPic = [ 
'images/foto1main.jpg',
'images/foto2main.jpg',
'images/foto3main.jpg',
'images/foto4main.jpg',
'images/foto5main.jpg',
'images/foto6main.jpg',
''
]


aWprowPic = [
'images/wprowadzenie_01.jpg',
'images/wprowadzenie_02.jpg',
'images/wprowadzenie_03.jpg',
''
]
 
 
 
var aImages = new Array()
 
 for(j=0; j<aPic.length; j++){
 aImages[j] = new Image(543,243);
 aImages[j].src = aPic[j];
 }
 
 
 var aWprow = new Array()
 
 for(j=0; j<aWprowPic.length; j++){
 aWprow[j] = new Image(548,260);
 aWprow[j].src = aWprowPic[j];
 }
 
 
  j = 0;
  i = 1;
 function bannery(oImag){
 iTransp = 0;
 fTransp = 0;
 oBanner = document.getElementById('bann');
 oImg1 = oBanner.getElementsByTagName('img')[0];
 oImg2 = oBanner.getElementsByTagName('img')[1];
 opacity(oImg2);
 j++
 i = j-1
 if(j==oImag.length-1){
  j = 0;
  }

 
 oImg1.src = oImag[i].src;
 oImg2.src = oImag[j].src;
 iTimer = setTimeout(function(){bannery(oImag)},8000);
 }