var linki = document.getElementsByTagName('a');
for(i=0; i < linki.length; i++){
  if (linki[i].className=='photoList')
    linki[i].onclick = function() {return ale(this)};
}

function ale(temp){
var linki = document.getElementsByTagName('a');
var nr = 0;
for(i=0; i < linki.length; i++){
  if (linki[i].className=='photoList')
    nr++;
    var id = "photoList_"+nr;
    if(linki[i] == temp){
      
    linki[i].id = id+"_active";
    }
    else{
    linki[i].id = id;
    }
}

  var img = temp.name;
  var src = "<img src='upLoad/"+img+"' alt='' />";
  document.getElementById("realizacjeMainPhoto").innerHTML = src ;
}

var inputValue;
function changeInputOn(temp){
  inputValue = temp.value; 
  temp.value="";
}

function changeInputOff(temp){
  if(temp.value == ""){
    temp.value = inputValue;
  } 
}