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

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;
}

/*--setup--*/

window.onload=function() {

tab.setup = {

   tabs: document.getElementById('tab').getElementsByTagName('li'),

   pages: [

      document.getElementById('tokyo'),

      document.getElementById('osaka'),

      document.getElementById('nagoya')

   ]

}

tab.init();

}

/*--setup end--*/

  

var tab = {

   init: function(){

      var tabs = this.setup.tabs;

      var pages = this.setup.pages;
		var cookie=readCookie("tab");

		for(i=0; i<pages.length; i++) {
			if(i !== 0) pages[i].style.display = 'none';
			tabs[i].onclick = function(){ tab.showpage(this); return false; };
		}
		if(cookie != null){
			tab.showpage(tabs[cookie]);
		}
	},

  

   showpage: function(obj){

      var tabs = this.setup.tabs;

      var pages = this.setup.pages;

      var num;

  

      for(num=0; num<tabs.length; num++) {

         if(tabs[num] === obj) break;

      }

  

      for(var i=0; i<pages.length; i++) {

         if(i == num) {

            pages[num].style.display = 'block';

            tabs[num].className = 'selected';
			createCookie("tab",num,365);

         }

         else{

            pages[i].style.display = 'none';

            tabs[i].className = null;

         }

      }

   }

}