function   c_dis(td_now, mCols)   
  {   
  divobj1=document.getElementById("n1");   
  divobj2=document.getElementById("n2");  
  divobj3=document.getElementById("n3");
  if(td_now.id   ==   "s_td_1")   
  {   
  divobj1.style.display='block'   
  divobj2.style.display='none'  
  divobj3.style.display='none' 
  }   
    
   if(td_now.id   ==   "s_td_2")   
  {   
  divobj2.style.display='block'   
  divobj1.style.display='none'  
  divobj3.style.display='none'
  } 
  if(td_now.id   ==   "s_td_3")   
  {   
  divobj3.style.display='block'   
  divobj1.style.display='none'  
  divobj2.style.display='none'
  }
  }
  // JavaScript Document