function smilies(tag) {
   var myField;
   if (document.getElementById('comment') && document.getElementById('comment').type == 'textarea') {
      myField = document.getElementById('comment');
   }
   else {
      return false;
   }
   if (document.selection) {
      myField.focus();
      sel = document.selection.createRange();
      sel.text = tag;
      myField.focus();
   }
   else if (myField.selectionStart || myField.selectionStart == '0') {
      var startPos = myField.selectionStart;
      var endPos = myField.selectionEnd;
      var cursorPos = endPos;
      myField.value = myField.value.substring(0, startPos)
                 + tag
                 + myField.value.substring(endPos, myField.value.length);
      cursorPos += tag.length;
      myField.focus();
      myField.selectionStart = cursorPos;
      myField.selectionEnd = cursorPos;
   }
   else {
      myField.value += tag;
      myField.focus();
   }
}