var menu_speed = 8;
var menu_initialized = false;
var menu_current = new Array();
var menu_hide_timeout = 0;
var menu_anim_timeout = 0;

var menu_anim = new Array();
function menu_anim_step(){
	menu_anim_timeout = window.setTimeout("menu_anim_step();", 10);
	for (var i=0; i<menu_anim.length; i++)
	{
		if (menu_anim[i]==null)continue;
		menu_anim[i].height += menu_anim[i].step;
		var h = menu_anim[i].height;
		var n = menu_anim[i].node;
		if (menu_anim[i].step<0)
		{
			if (menu_anim[i].height<=menu_anim[i].limit){
				h = menu_anim[i].limit;
				menu_anim[i] = null;
			}
		}
		else {
			if (menu_anim[i].height>=menu_anim[i].limit){
				h = menu_anim[i].limit;
				menu_anim[i] = null;
			}
		}
		n.style.height = h+"px";
		if (h==0)
		{
			n.style.height = "1px";
			n.style.visibility = 'hidden';
		}
		else {
			n.style.visibility = 'visible';
		}
	}
}
menu_anim_step();

function menu_render(id, items){
	var div = document.createElement("div");
	var html = "<table celpadding='0' cellspacing='0' border='0' width='100%'>";
	for (var j=0; j<items.items.length; j++)
	{
		if (items.items[j]['sub']){
			html += '<tr><td onmouseover="this.className=\'over\'; menu_over(this, \''+id+':'+j+'\');" onmouseout="this.className=\'\'; menu_out(this, \''+id+':'+j+'\');" onclick="menu_click(\''+id+':'+j+'\');">&nbsp;&nbsp;&nbsp;'+items.items[j].title+'</td></tr>';
			items.items[j].node = menu_render(id+':'+j, items.items[j]['sub']);
			items.items[j].parent = div;
		}
		else {
			html += '<tr><td onmouseover="this.className=\'over\'; menu_over(this, \''+id+':'+j+'\');" onmouseout="this.className=\'\'; menu_out(this, \''+id+':'+j+'\');" onclick="menu_click(\''+id+':'+j+'\');">&nbsp;&nbsp;&nbsp;'+items.items[j].title+'</td></tr>';
		}
	}
	html += '</table>';
	if (items.className)
	{
		div.className = "menu "+items.className;
	}
	else {
		div.className = "menu";
	}
	div.style.position = 'absolute';
	div.style.overflow = 'hidden';
	div.style.left = '-450px';
	div.style.top = '-350px';

	div.style.visibility = 'hidden';
	if (id.indexOf(':')==-1)
		div.style.height = '1px';
	div.innerHTML = html;
	document.body.appendChild(div);
	return div;
}

function menu_init(){
	if (menu_initialized)return;
	menu_initialized = true;

	if (!menu_data)return;

	for (var i in menu_data)
	{
		menu_data[i].node = menu_render(i, menu_data[i]);
	}
}

function menu_node_pos(n){
	if (n.offsetParent)
	{
		var pos = menu_node_pos(n.offsetParent);
		pos.x+=n.offsetLeft;
		pos.y+=n.offsetTop;
		return pos;
	}
	return {x:n.offsetLeft, y:n.offsetTop};
}

function menu_click(id){
	var cur = menu_data;
	var tmp = id.split(/:/);
	var path = new Array();
	for (var i=0;i<tmp.length;i++)
	{
		if (!cur||!cur[tmp[i]]){
			break;
		}
		path[i] = cur[tmp[i]];
		if (!cur[tmp[i]].items)
		{
			if (cur[tmp[i]].sub)
				cur = cur[tmp[i]].sub.items;
			else
				break;
		}
		else
			cur = cur[tmp[i]].items;
	}
	if (path.length==0)return;
	var item = path[path.length-1];
	if (item.url){
		top.frames["mainFrame"].location.href=item.url;
	}
}

function menu_over(n, id){
	if (!menu_initialized)return;

	var menu_item = null;
	var cur = menu_data;
	var tmp = id.split(/:/);
	var path = new Array();
	for (var i=0;i<tmp.length;i++)
	{
		if (!cur||!cur[tmp[i]]){
			break;
		}
		path[i] = cur[tmp[i]];
		cur = cur[tmp[i]].items;
	}

	window.clearTimeout(menu_hide_timeout);

	for (var i=path.length; i<menu_current.length; i++ )
	{
		if (menu_current[i]==null)break;
		if (menu_current[i].node){
			if (i==0)
				menu_hide_first(menu_current[i]);
			else
				menu_current[i].node.style.visibility = 'hidden';
		}
		menu_current[i] = null;
	}

	var i = path.length-1;
	while (i>=0)
	{
		if (menu_current[i])
		{
			if (menu_current[i]==path[i])break;
			if (menu_current[i].node){
				if (i==0)
					menu_hide_first(menu_current[i]);
				else
					menu_current[i].node.style.visibility = 'hidden';
			}
			menu_current[i] = null;
		}
		i--;
	}
	i++;

	if (i==path.length)return;
	while (i<path.length)
	{
		if (i==path.length-1 && n && path[i].node)
		{
			var pos = menu_node_pos(n);
			if (path[i].offsetLeft)
			{
				pos.x+=path[i].offsetLeft;
			}
			if (i==0)
			{
				path[i].node.style.left = pos.x+'px';
				path[i].node.style.top = pos.y+n.offsetHeight-1+'px';
			}
			else {
				path[i].node.style.left = pos.x+n.offsetWidth-1+'px';
				path[i].node.style.top = pos.y+'px';
			}
		}
		if (path[i].node){
			if (i==0)
				menu_show_first(path[i]);
			else
				path[i].node.style.visibility = 'visible';
		}
		menu_current[i] = path[i];
		i++;
	}
}

function menu_out(n, id){
	if (!menu_initialized)return;
	window.clearTimeout(menu_hide_timeout);
	menu_hide_timeout = window.setTimeout("menu_hide();", 300);
}

function menu_hide(){
	for (var i=0; i<menu_current.length; i++ )
	{
		if (menu_current[i]==null)break;
		if (menu_current[i].node)
		{
			if (i==0)
				menu_hide_first(menu_current[i]);
			else
				menu_current[i].node.style.visibility = 'hidden';
		}
		menu_current[i] = null;
	}
}

function menu_hide_first(n){
	var anim = null;
	var pos = menu_anim.length;
	for (var i=0; i<menu_anim.length; i++)
	{
		if (!menu_anim[i])pos = i;
		if (menu_anim[i]&&menu_anim[i].node==n.node)
		{
			anim = menu_anim[i];
			break;
		}
	}
	if (anim==null)
	{
		anim = {node: n.node};
		menu_anim[pos] = anim;
	}
	anim.height = n.node.offsetHeight;
	n.node.style.height = anim.height+"px";
	anim.limit = 0;
	anim.step = -menu_speed;
}
function menu_show_first(n){
	var anim = null;
	var pos = menu_anim.length;
	for (var i=0; i<menu_anim.length; i++)
	{
		if (!menu_anim[i])pos = i;
		if (menu_anim[i]&&menu_anim[i].node==n.node)
		{
			anim = menu_anim[i];
			break;
		}
	}
	if (anim==null)
	{
		anim = {node: n.node};
		menu_anim[pos] = anim;
	}
	anim.height = n.node.offsetHeight;
	n.node.style.height = anim.height+"px";
	anim.limit = n.node.scrollHeight+10;
	anim.step = menu_speed;
}