// JScript Îļþ

function secBoard(n)
{
  var secTable = document.getElementById("secTable");
  var mainTable1 = document.getElementById("mainTable");
  for(i=1;i<5;i++){
    secTable.rows[0].cells[i*2-1].className="sec1";}
  secTable.rows[0].cells[n*2-1].className="sec2";
  for(i=1;i<=mainTable1.tBodies.length;i++){
    mainTable1.tBodies[i-1].style.display="none";
  mainTable1.tBodies[n-1].style.display="block";}
}