function secBoard(n)
{
    for(i=0;i<menu.childNodes.length;i++)
    menu.childNodes[i].className="sec1";
    menu.childNodes[n].className="sec2";
    for(i=0;i<main.childNodes.length;i++)
    main.childNodes[i].style.display="none";
    main.childNodes[n].style.display="block";
}

function SwitchMenu(obj)
    {
	    var el = document.getElementById(obj);
	    var ar = document.getElementById("masterdiv").getElementsByTagName("span");
		    if(el.style.display != "block"){
			    for (var i=0; i<ar.length; i++){
				    if (ar[i].className=="submenu")
				    ar[i].style.display = "none";
			    }
			    el.style.display = "block";
		    }else{
			    el.style.display = "none";
		    }
    }