Javascript Error...For One Code Block I Am Facing Exception

document.getElementById('lmlNoteProxy').value = document.getElementById('<%=lmlNote.ClientID%>').value;
      document.getElementById('<%=lmlNote.ClientID%>').value = document.getElementById('<%=lmlNote.ClientID%>').value.replace(/&lt;/g, '<').replace(/&gt;/g, '>');
      //PLS-26668 start
                 var r = document.getElementById('<%=lmlNote.ClientID%>').createTextRange();
          r.collapse(true);
          r.select();