function secBoard(n){
   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 secBoardd(n){
   for(i=0;i<secTable.cells.length;i++)
	secTable.cells[i].className="secc1";
	secTable.cells[n].className="secc2";
   for(i=0;i<mainTable.tBodies.length;i++)
	mainTable.tBodies[i].style.display="none";
	mainTable.tBodies[n].style.display="block";
}
function secBoarddd(n){
   for(i=0;i<secTable.cells.length;i++)
	secTable.cells[i].className="seccc1";
	secTable.cells[n].className="seccc2";
   for(i=0;i<mainTable.tBodies.length;i++)
	mainTable.tBodies[i].style.display="none";
	mainTable.tBodies[n].style.display="block";
}