function showRows () {
	var table;
	table = document.all ? document.all.cnTable :
            document.getElementById('cnTable');  
  table.rows[table.rows.length - 1].style.display = 'none';
  for (var r = (table.rows.length - 2); r > 0 ; r--) {
    if (table.rows[r].style.display == 'none') {
    	table.rows[r].style.display = ''
    }
  }
}