function secBoard(n)
{
    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)
{
    for(i=0;i<banjieTable.cells.length;i++) { 	
      banjieTable.cells[i].className="sec11"; 
      }
   banjieTable.cells[n].className="sec21";
    for(i=0;i<mainTable0.tBodies.length;i++) {   	
      mainTable0.tBodies[i].style.display="none"; 
      }
    mainTable0.tBodies[n].style.display="block";
}
function secBoard2(n)
{
    for(i=0;i<banjieTable1.cells.length;i++)
      banjieTable1.cells[i].className="sec13";
   banjieTable1.cells[n].className="sec21";
    for(i=0;i<mainTable1.tBodies.length;i++)
      mainTable1.tBodies[i].style.display="none";
    mainTable1.tBodies[n].style.display="block";
}