var state = 0;
var menuCount = 6;

function hideItem(i)
{
	document.getElementById("menuitem"+i).style.display = 'none';
}

function showItem(i)
{
	document.getElementById( "menuitem"+i).style.display = 'block';
	state = i;
	setCookie("menuState", state);
}

function menuinit()
{
	for( i=1 ; i<=menuCount ; i++ ) hideItem(i);
	
	state = getCookie("menuState");
	if(state == null) state = 1;
	showItem(state);
}

function menuexpand(i)
{
	if(state == i) return;
	
	if(state > 0) hideItem(state);
	
	if(state != i)
		showItem(i);
	else
	{
		state = 0;
		setCookie("menuState", state);
	}
}

function menucollapse()
{
	for( i=1 ; i<=menuCount ; i++ ) hideItem(i);
	state = 0;
	setCookie("menuState", state);
}

function setCookie(c_name, value)
{
	document.cookie = c_name+ "=" +escape(value)
}

function getCookie(c_name)
{
	if (document.cookie.length>0)
	{
		c_start=document.cookie.indexOf(c_name + "=")
		if (c_start!=-1)
		{ 
			c_start=c_start + c_name.length+1
			c_end=document.cookie.indexOf(";",c_start)
			if (c_end==-1) c_end=document.cookie.length
				return unescape(document.cookie.substring(c_start,c_end))
		}
	  }
	return null
}