function validate_length(obj, maxchars) {
  lang= "{lang}";
  str= new String(obj.value);
  
  if(str.length>maxchars)
    obj.value= str.substr(0, maxchars);    
    
  var id_counter= "id_"+eval("obj.name")+"_counter";
  
  var match= /^(.*?)([0-9]+)(.*)/;
  var html= new String(document.getElementById(id_counter).innerHTML);
  
  document.getElementById(id_counter).innerHTML= html.replace(match, "$1"+str.length+"$3");
  if(str.length>=maxchars)
    document.getElementById(id_counter).className= "hiba";
  else
    document.getElementById(id_counter).className= "";

    
    
}