function csere_img(name, nsdoc, rpath, preload)
  { 
    var img = eval((navigator.appName.indexOf('Netscape', 0) != -1) ? nsdoc+'.'+name : 'document.all.'+name);
    if (name == '')
      return;
      
    if (img) {
      img.altsrc = img.src;
      img.src    = rpath;
    }
  }
  
  obj= function create_img(path,azonosito,tdtag)
  {
  
    try 
    {
      element = document.createElement('<img src="' + path + '" border="0" name="' + azonosito +'" id="' + azonosito +'" width="50" height="50"/>');
    } 
    catch (e) 
    {
      element = document.createElement("img");
      element.src =path;
      element.border='0';
      element.name=azonosito;
      element.id=azonosito;
      element.width='50';
      element.height='50';
    }
    document.getElementById(tdtag).appendChild(element);
    return element;
  }

  
  function kepvaltas(path,azonosito,tdtag,trtag,id)
  {
    var ishavepic =document.getElementById(trtag).style.display;
    var rpath =path + '' + document.getElementById(id).value;
    if (document.getElementById(id).value!=0 && ishavepic=='none') 
    { 
      element=create_img(rpath,azonosito,tdtag);
      document.getElementById(trtag).style.display ='';
    }
    if (document.getElementById(id).value==0) 
    { 
      document.getElementById(tdtag).removeChild(element);
      document.getElementById(trtag).style.display='none';
    }
    csere_img(azonosito, 'document', rpath, true);
  }