<script>  
       var x = 0;    
       var y = 0;
       const krok = 64;
       const polomer = 64;        
       var smile;

       function vytvoritObrazek(id) {
            var img = document.createElement("img");
            img.id = "dolar" + id;
            img.src = "img/dollar.png";        
            img.style.position = "absolute";
            img.style.left = (Math.round(Math.random()*5)*krok + 2*krok).toString() + "px";   
            img.style.top = (Math.round(Math.random()*5)*krok + 2*krok).toString() + "px";                    
            var stranka = document.getElementById("stranka");
            stranka.appendChild(img);              
       }             
             
       document.onkeydown = function(evt) {
          var event = window.event || evt;
          var kod = event.keyCode;         
          switch(kod) {
              case 38:
                  y = y - krok; 
                  break;
              case 1:
                  x = x + krok;
                  y = y - krok;
                  break;
              case 39:
                  x = x + krok; 
                  break;
              case 3:
                  x = x + krok;
                  y = y + krok;
                  break;
              case 40:
                  y = y + krok; 
                  break;
              case 5:
                  x = x - krok;
                  y = y + krok;
                  break;
              case 37:
                  x = x - krok; 
                  break;
              case 7:
                  x = x - krok;
                  y = y - krok;
                  break;             
              default:         
                 // alert("Stisknutý kod: " + kod.toString());
          }
          smile.style.left = x + "px";
          smile.style.top = y + "px"; 
          console.log(document.getElementById('dolar0').x);                             
        }
       window.onload = function() {
            vytvoritObrazek(0);
            smile = document.getElementById('smile');
       } 
    </script> 
  

    <div style="height:100vh;" id="stranka">
          <img src="img/smile.png" id="smile" width="64" height="64" style="position:absolute; left:0px; top:0px;">        
    </div>