var curNav = 0;
var actDiv = null; 
var timerID = null; 
var timerOn = false; 

function hd(myNum) {  
  if (actDiv == myNum){
    actDiv = null;
  }
	var tDiv= "sn" + myNum; 
	var tSubnav= "an" + myNum;
	if (myNum>6) {prevColor = "#FFFFFF";}else{prevColor = "#990033";};
	document.getElementById(tDiv).style.display="none";
	document.getElementById(tSubnav).style.background=prevColor;
	document.getElementById(myHomebox).style.display="block";
}

function sd(myNum) {  
	if (actDiv != null && actDiv != myNum) hd(actDiv);
	if (myNum != curNav){
	  myDiv= "sn"+myNum;
	  mySubnav= "an"+myNum;
	  myHomebox= "home_box";
	  if (myNum>6) {thisColor = "#002E40";}else{thisColor = "#7B7B7B";};
	  document.getElementById(mySubnav).style.background=thisColor;
	  document.getElementById(myDiv).style.display="block";
	  actDiv = myNum;
	  document.getElementById(myHomebox).style.display="none";
	}
	stopTimer();
}

function stopTimer() {
	clearTimeout(timerID);
	timerID = null;
	timerOn = false;	
}
function startTimer() {
	if (timerOn) {stopTimer()}else {
	timerOn=true;
	timerID=setTimeout("hd('"+actDiv+"')", 1000);
	};
}