function secBoard(n,secTable,mainTable)
  {
    for(i=0;i<secTable.cells.length;i++)
    secTable.cells[i].className="sec11";
    secTable.cells[n].className="sec21";
    for(i=0;i<mainTable.tBodies.length;i++)
    mainTable.tBodies[i].style.display="none";
    mainTable.tBodies[n].style.display="block";
  }
  
function secBoard1(n,secTable,mainTable)
  {
    for(i=0;i<secTable.cells.length;i++)
    secTable.cells[i].className="sec1";
    secTable.cells[n].className="sec2";
    for(i=0;i<mainTable.tBodies.length;i++)
    mainTable.tBodies[i].style.display="none";
    mainTable.tBodies[n].style.display="block";
  }
    
function secBoard2(n,secTable,mainTable)
  {
    for(i=0;i<secTable.cells.length;i++)
    secTable.cells[i].className="sec12";
    secTable.cells[n].className="sec22";
    for(i=0;i<mainTable.tBodies.length;i++)
    mainTable.tBodies[i].style.display="none";
    mainTable.tBodies[n].style.display="block";
  }