public CyrillicDocument() 
{
			super();
}

 public  void insertString(int aOffset,
    String aString,
    AttributeSet anAttr) throws BadLocationException 
{
		
			StringBuffer buffer = new StringBuffer(aString.length());
			Character.UnicodeBlock cyr = Character.UnicodeBlock.CYRILLIC;
			char[] chars = aString.toCharArray();
			for (int i = 0; i <  chars.length; i++) {
				if (Character.UnicodeBlock.of(chars[i]).equals(cyr)) {
					buffer.append(chars[i]);
				}
				else {
					try {
						String c = new Character(chars[i]).toString();
						byte[] b = c.getBytes("ISO-8859-1");
						buffer.append(new String(b, "Cp1251"));
					}
					catch (java.io.UnsupportedEncodingException e) {
						e.printStackTrace();
					}
				}
			}
			super.insertString(aOffset, buffer.toString(), anAttr);
}