function reduceTextLength(object)
{
   if ( typeof object == 'string' )
      object = document.getElementById(object);

   var maxLength = parseInt(object.getAttribute('maxlength'));
   var length = object.value.length;

   if ( object.value.length > maxLength )
   {
      object.value = object.value.substring(0, maxLength);
      document.getElementById('brojZnakova').value = 0;
   }
   else
      document.getElementById('brojZnakova').value = maxLength - length;

   return true;
}