function do_cool(Total,number,index){

 for (var i = 1; i <= number; i++) {

      document.getElementById('pht' +Total+ i).className = 'ph_t2';

      document.getElementById('phtab' +Total+ i).style.display = 'none';

 }

  document.getElementById('pht' + Total+ index).className = 'ph_t1';

  document.getElementById('phtab' + Total+ index).style.display = 'block';

}