function sellay2(num){
				 for(var id = 21;id<=25;id++)
				 {
				  var ss="tlist"+id;
				  if(id==num)
				  document.getElementById(ss).style.display="block";
				  else
				  document.getElementById(ss).style.display="none";
				 }
				 
				 for(var id = 21;id<=25;id++)
				 {
				  var bb="ltitle"+id;
				  if(id==num)
				  document.getElementById(bb).className="active";
				  else
				  document.getElementById(bb).className="";
				 } 
				}