function Yn2Br_IE(str) {
  str = str.replace(/\r?\n/ig,'<br type="end_of_element" />');
  return (str);
}


function Br2Yn_IE(str) {
  var arr = new Array;
  str = str.replace(/\r?\n/ig,'');
  str = str.replace(/<br type="end_of_element".*?>/ig,"\n");
  return (str);
}


function $(tagId) {
  return document.getElementById(tagId);
}