[JavaScript] Textarea: Zeichen zählen (Problem mit Absätzen)

[omata]

Ok, hier ein neuer Versuch...

Code:

function limit() {
  var text = document.getElementById('smstext').value;
  var newtext = '';
  var i = 0;
  while (i < text.length) {
    if (text.charCodeAt(i) == 10) {
      newtext = newtext + String.fromCharCode(13, 10);
    } else if (text.charCodeAt(i) != 13) {
      newtext = newtext + text.charAt(i);
    }
    i++;
  }
  if(newtext.length > 160) {
    newtext = newtext.substring(0, 160);
    document.getElementById('smstext').value = newtext;
  }
  var rest = 160 - newtext.length;
  var str  = "" + rest + " Zeichen &uuml;brig";
  document.getElementById("smsline").innerHTML = str;
}