function bbcode(tag) {
 document.getElementById('komentarz').koment_tresc.value+=tag;
 document.getElementById('komentarz').koment_tresc.focus();
}

function licz(ile, id, string) {
  var maxLength = (ile);
	var idPola = document.getElementById(id);
  var oSpan = document.getElementById('licz');
  oSpan.innerHTML = 'Pozostało '+ (maxLength - (string.length) ) +' znaków';
  if( maxLength - (string.length) < 0 ) { idPola.style.borderColor='red'; } else { idPola.style.borderColor='#fff8dc'; }
}