function createCookie(name,value,days) {
 var expires = "";
 if (days) {
 var date = new Date();
 date.setTime(date.getTime()+(days*24*60*60*1000));
 expires = "; expires="+date.toGMTString();
 }
 document.cookie = name+"="+value+expires+"; path=/";
}

function eraseCookie(name) {
 createCookie(name,"",-1);
}

function readCookie(name) {
 var nameEQ = name + "=";
 var ca = document.cookie.split(';');
 for(var i=0;i < ca.length;i++) {
 var c = ca[i];
 while (c.charAt(0)===' '){ c = c.substring(1,c.length); }
 if (c.indexOf(nameEQ) === 0){ return c.substring(nameEQ.length,c.length); }
 }
 return null;
}

function hideAllHiddenItems() {
 eraseCookie("menu");
 createCookie("menu","0","1");
 
 var root = document.getElementById("box-navi");
 var divs = root.getElementsByTagName("div");

 for(i=0;i<divs.length;i++) {
   var classes = divs[i].className.split(' ');
   if(classes[0] == "navi-inside" && classes[1] != "act") {
   	divs[i].style.visibility = "hidden";
   	
   }
 }
  
 }
 
function hideAllActiveTabs() {
 var root = document.getElementById("box-navi");
 var divs = root.getElementsByTagName("a");
  
 for(i=0;i<divs.length;i++) {
   
    divs[i].className = "";
   	
  }
}



function hideAllHiddenItems2() {
 eraseCookie("menu");
 createCookie("menu","0","1");

 var root = document.getElementById("box-navi");
 var divs = root.getElementsByTagName("div");

 for(i=0;i<divs.length;i++) {
   var classes = divs[i].className.split(' ');
   if(classes[0] == "navi-inside") {
   	divs[i].style.visibility = "hidden";
   }
 }
}


function resetHiddenItems() {
  var data = readCookie('menu');
  if(data==1){
	hideAllHiddenItems();
	var root = document.getElementById("box-navi");
 	var divs = root.getElementsByTagName("div");

	for(i=0;i<divs.length;i++) {
   		var classes = divs[i].className.split(' ');
   		if(classes[0] == "act" || classes[1] == "act") {
   			divs[i].style.visibility = "visible";
   		
   		}
 	}

 	hideAllActiveTabs();
 	var tab = document.getElementById("act");
 	if(tab){
 		tab.className="act";
 	}
   } 
}