var active=null;

function addItem(oid,text,pid,url)
{
pid=document.getElementById(pid);
if(pid.getElementsByTagName("span").length==0) pid=createTag("span",pid);
else pid=pid.getElementsByTagName("span")[0];

mi=createTag("div",pid);
mi.id=oid;

miImg=createTag("img",mi);
miImg.align="absbottom";
miImg.className="ico";

mia=createTag("a",mi);
mia.innerHTML=text;
mia.className="mi";
mia.onclick=function(e){mi_click(e)};
mia.onfocus=function(e){mi_focus(e)};
if(url!=null) mia.href=url;

createTag("br",mi);
}


function createTag(tag,pel){
el=document.createElement(tag);
return pel.appendChild(el);
}


function initMenu(act)
{
root=document.getElementById("menu");

els=root.getElementsByTagName("a");
for(i=0; i<els.length; i++){	
	els[i].parentNode.className = els[i].parentNode.nextSibling!=null ? "lsbg" : "ls"; //div style
	
	img=els[i].parentNode.getElementsByTagName("img")[0]; //block image
	if(els[i].parentNode.getElementsByTagName("span")[0]!=null){ //block subblock
		els[i].parentNode.getElementsByTagName("span")[0].style.display='none';
		img.src="im/fol+.gif";
		img.onclick=function(e){img_click(e)};
		}
	else img.src = els[i].parentNode.nextSibling!=null ? "im/file.gif" : "im/file_end.gif";
	}
	
if(act!=null) node_open(act);
}


function mi_click(e)
{
obj = eventHandler(e);
node_activate(obj);
if((node=obj.parentNode.getElementsByTagName("span")[0])==null) return;
if(node.style.display!="block"){
	node.style.display="block";
	obj.parentNode.firstChild.src="im/fol-.gif";
	}
}


function img_click(e)
{
obj = eventHandler(e);
if((node=obj.parentNode.getElementsByTagName("span")[0])==null) return;

if(node.style.display!="block"){
	node.style.display="block";
	obj.src="im/fol-.gif";
	}
else{
	node.style.display="none";
	obj.src="im/fol+.gif";
	}
}


function mi_focus(e)
{
obj = eventHandler(e);
obj.blur();
}


function node_open(node_id)
{
if((node=document.getElementById(node_id))==null) return;
node_activate(node.getElementsByTagName("a")[0]);
while(node.id!="0") {
	node=node.parentNode;
	node.style.display="block";
	if(node.tagName=="DIV") node.getElementsByTagName("img")[0].src="im/fol-.gif";
	}
}


function node_activate(node_a)
{
if(active!=null) active.className='mi';
active=node_a;
active.className+='act';
}


function eventHandler(e){
return window.event ? window.event.srcElement : e.currentTarget;
}