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

function secBoard1(n) {
    var secTable1=document.getElementById("secTable1");
    for(i=0;i<secTable1.cells.length;i++)
    secTable1.cells[i].className="sec1";
    secTable1.cells[n].className="sec2";
    var mainTable1=document.getElementById("mainTable1");
    for(i=0;i<mainTable1.tBodies.length;i++)
      mainTable1.tBodies[i].style.display="none";
    mainTable1.tBodies[n].style.display="block";
}

function secBoard2(n) {
    var secTable2=document.getElementById("secTable2");
    for(i=0;i<secTable2.cells.length;i++)
    secTable2.cells[i].className="sec1";
    secTable2.cells[n].className="sec2";
    var mainTable2=document.getElementById("mainTable2");
    for(i=0;i<mainTable2.tBodies.length;i++)
      mainTable2.tBodies[i].style.display="none";
    mainTable2.tBodies[n].style.display="block";
}

function secBoard3(n) {
    var secTable3=document.getElementById("secTable3");
    for(i=0;i<secTable3.cells.length;i++)
    secTable3.cells[i].className="sec1";
    secTable3.cells[n].className="sec2";
    var mainTable3=document.getElementById("mainTable3");
    for(i=0;i<mainTable3.tBodies.length;i++)
      mainTable3.tBodies[i].style.display="none";
    mainTable3.tBodies[n].style.display="block";
}
function doZoom(size,did){
	document.getElementById(did).style.fontSize=size+'px'
}