// Cookie-funktiot otettu www.w3school.comista
function set_cookie(c_name,value,expiredays)
{
	var exdate=new Date()
	exdate.setDate(exdate.getDate()+expiredays)
	document.cookie=c_name+ "=" +escape(value)+
	((expiredays==null) ? "" : ";expires="+exdate.toGMTString())+"; path=/;"
}

function get_cookie(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 ""
}

function open_menu(e)
{
	var targ
	if (!e) return
	if (e.target) targ = e.target
	else if (e.srcElement) targ = e.srcElement
	if (targ.nodeType == 3) // defeat Safari bug
	   targ = targ.parentNode
	targ=targ.parentNode
	var text=targ.href
	text=text.substr(text.lastIndexOf("&"), 7)
	targ=targ.parentNode.parentNode
	var ul = targ.getElementsByTagName("ul")
	if(ul[0].className == "") {
		ul[0].className = "piilotettu"
		set_cookie(text, 0, 7)
		var img = targ.getElementsByTagName("img")
		img[0].src = "kuvat/plus.png"
	} else {
		ul[0].className = ""
		set_cookie(text, 1, 7)
		var img = targ.getElementsByTagName("img")
		img[0].src = "kuvat/minus.png"
	}
	
	return false
}

function check_cookies() 
{
	var i
	var anchors = document.getElementsByTagName("a")
	for(i in anchors) {
		var url = anchors[i].href
		try {
			var hidden = get_cookie(url.substr(url.lastIndexOf("&"), 7))
			if(hidden != "") {
				var ul = anchors[i].parentNode.parentNode.getElementsByTagName("ul")
				if(hidden == 0) {
					ul[0].className = "piilotettu"
					var img = anchors[i].getElementsByTagName("img")
					img[0].src = "kuvat/plus.png"
				} else {
					ul[0].className = ""
					var img = anchors[i].getElementsByTagName("img")
					img[0].src = "kuvat/minus.png"
				}
			}
		} catch(err) {
		
		}
	}
}