function whatCorrector( replacestr ) {
  var replaces=0;
  var ta = document.getElementsByTagName("textarea");
  var tal = ta.length;
  var tmp = new Array(tal);
 
  for (var i = 0; i < tal; i++) {
    tmp[i] = ta[i].value;
  }
  document.body.innerHTML=document.body.innerHTML.replace(replacestr,'@');
  for (var i = 0; i < tal; i++) {
    ta[i].value = tmp[i];
  }
}