function Add(text, textarea) {

	var textarea = document.getElementById('popis');

	// for IE (omfg)
  if (document.selection) {
    textarea.focus();
    vyber = document.selection.createRange();
    vyber.text = '\n' + text;
	}
	//gecko
  else if(textarea.selectionStart || textarea.selectionStart == 0) {
    startPos = textarea.selectionStart;
    endPos = textarea.selectionEnd;

		textarea.value = textarea.value.substring(0, startPos) + '\n' + text + textarea.value.substring(endPos, textarea.value.length);
  }

  else textarea.value += '\n' + text;
}