var activeTab='';

function activateTab(pID,no) {

  if (!activeTab) activeTab=pID+'_1';
  if (activeTab!=pID+'_'+no) {
    document.getElementById('tab_'+pID+'_'+no).className='active';  
    document.getElementById('ce_'+pID+'_'+no).className='ce';
  
    document.getElementById('ce_'+activeTab).className='hidden';
    document.getElementById('tab_'+activeTab).className='tab';

    activeTab=pID+'_'+no;
  }
}