function ShowReg(num,op) {
//alert(num);alert(op);
// TODO: remove all layer lager it.

  for (i=num;i<3;i++)
  {
	  document.getElementById('BalletLevel'+i).style.display='none';
	  document.getElementById('LatinLevel'+i).style.display='none';
	  document.getElementById('JazzLevel'+i).style.display='none';
	  document.getElementById('TapLevel'+i).style.display='none';
	  document.getElementById('HipHopLevel'+i).style.display='none';
	  document.getElementById('BreakLevel'+i).style.display='none';
	  document.getElementById('ClubLevel'+i).style.display='none';
	}
  if (op == 1) {
    document.getElementById('BalletLevel'+num).style.display="block";
  }
  if (op == 2) {
    document.getElementById('LatinLevel'+num).style.display="block";
  }
  if (op == 3) {
    document.getElementById('JazzLevel'+num).style.display="block";
  }
   if (op == 4) {
    document.getElementById('TapLevel'+num).style.display="block";
  }
   if (op == 5) {
    document.getElementById('HipHopLevel'+num).style.display="block";
  }
  if (op == 6) {
    document.getElementById('BreakLevel'+num).style.display="block";
  }
  if (op == 7) {
    document.getElementById('ClubLevel'+num).style.display="block";
  }
}