var menu_count = 6;

function toggle_menu(id) {
	var obj = document.getElementById(id);
	if ( obj == null ) return;
	for(i=1; i<=menu_count;i++) {
		if ( id != "menu"+i ) {
			var o = document.getElementById("menu"+i);
			if ( o != null && o.style.display == "block" ) {
				toggle_menu2("menu"+i);
			}
		}
	}
	obj.style.display = (obj.style.display == "none") ? "block" : "none";
	set_cookie(id, obj.style.display,"","/");
	toggle_img(id);
	//toggle_menu_word_img(id); // extra style
}

function toggle_img(id){
	var img_type;
	var obj = document.getElementById("img_"+id);
	if ( obj == null ) return;
	var img_src = obj.src;
	if( get_cookie(id) == 'block'){
		img_type ="_c.jpg";
	}else{
		img_type ="_a.jpg";
	}
	obj.src = img_src.substr(0,(img_src.length -6))+img_type;
}

function mImgRes(id){
	if( get_cookie(id) != 'block'){
		MM_swapImgRestore();
	}
}

function toggle_menu2(id) {
	var obj = document.getElementById(id);
	if ( obj == null ) return;
	obj.style.display = (obj.style.display == "none") ? "block" : "none";
	set_cookie(id, obj.style.display,"","/");
	toggle_img(id);
	//toggle_menu_word_img(id); // extra style
}

function set_cookie(name, value, expires, path, domain, secure) {
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

function get_cookie(name) {
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

function restore_menu_state() {
	var id_img ="";
	var def_open = false;
	if ( get_cookie("menu2") == null ) 
		def_open = true;

	for(var i=1; i<=menu_count; i++) {
		if ( get_cookie("menu"+i) != null ) {
			var obj = document.getElementById("menu"+i);
			obj.style.display = get_cookie("menu"+i);
			//if(obj.style.display == 'block') // extra style
			//	toggle_menu_word_img('menu'+i);	
			if(get_cookie("menu"+i) == 'block') id_img = "menu"+i;
		}
	}
	if(id_img)
		toggle_img(id_img);
	if(def_open == true)
		toggle_menu("menu2"); //default open menu for 1 first entry
}

function toggle_menu_word_img(id) { // extra style
	var obj = document.getElementById(id);
	if ( obj == null ) return;
	
	var obj2 = document.getElementById('word_'+id);
	if ( obj2 == null ) return;
	obj2.className = (obj.style.display == "none") ? "none" : "t_bk_menu1_open";

	var obj3 = document.getElementById('img_'+id);
	if ( obj3 == null ) return;
	obj3.src = (obj.style.display == "none") ? "../images/point_1.gif" : "../images/point_2.gif";
}