var openImg = new Image();
openImg.src = "/media/images/open.gif";
var closedImg = new Image();
closedImg.src = "/media/images/closed.gif";

function closeAll() {
	var i=1;
	for(i=1;i<5;i++) {
		var objBranch = document.getElementById('branch'+i).style;
		objBranch.display="none";
	}
}

function closeAllSubs() {
	var i=1;
	for(i=1;i<9;i++) {
		var objBranch = document.getElementById('sub_branch'+i).style;
		objBranch.display="none";
	}
}

function showBranch(branch) {
	closeAll();
   var objBranch = document.getElementById(branch).style;
   if(objBranch.display=="block")
      objBranch.display="none";
   else
      objBranch.display="block";
}

function showSubBranch(branch) {
	closeAllSubs();
   var objBranch = document.getElementById(branch).style;
   if(objBranch.display=="block")
      objBranch.display="none";
   else
      objBranch.display="block";
}

function swapFolder(img) {
   objImg = document.getElementById(img);
   if(objImg.src.indexOf('/media/images/closed.gif')>-1)
      objImg.src = openImg.src;
   else
      objImg.src = closedImg.src;
}

function Go() {
	var cookieVal;
	cookieVal = getCookie('menuID');
	if (cookieVal!=null) {
		showBranch('branch'+cookieVal);
		setCookie('menuID', cookieVal);
	}
	
	var cookieSubVal;
	cookieSubVal = getCookie('subMenuID');
	if (cookieSubVal!=null) {
		showSubBranch('sub_branch'+cookieSubVal);
		swapFolder('folder'+cookieSubVal);
		setCookie('subMenuID', cookieSubVal);
	}

}

function getCookieVal(offset) {
	var endstr = document.cookie.indexOf (";", offset);
	if (endstr == -1)
	endstr = document.cookie.length;
	return unescape(document.cookie.substring(offset, endstr));
}

function getCookie(name) {
	var arg = name + "=";
	var i = 0;
	while (i < document.cookie.length) {
		var j = i + arg.length;
		if (document.cookie.substring(i, j) == arg)
			return getCookieVal (j);
		i = document.cookie.indexOf(" ", i) + 1;
		if (i == 0)
			break; 
	}
	return null;
}

function setCookie(name, value) {
	document.cookie = name + "=" + escape (value) + "; path=/";
}