var opened = null;
      var imgH1 = new Image();
      var imgH2 = new Image();
      var imgH3 = new Image();
      var imgH4 = new Image();
      imgH1.src = "http://www.intspei.com/Images/menu_first_level_n.png";
      imgH2.src = "http://www.intspei.com/Images/menu_first_level_h.png";
      imgH3.src = "http://www.intspei.com/Images/menu_second_level_n.png";
      imgH4.src = "http://www.intspei.com/Images/menu_second_level_h.png";
              
      function MouseMenuOver(el)
      {
      el.className = "MenuOver"
      }

      function MouseMenuOut(el)
      {
      el.className = "Menu"
      }

      function MouseMenuOverS(el)
      {
      el.className = "MenuSecondOver"
      }

      function MouseMenuOutS(el)
      {
      el.className = "MenuSecond"
      }

      function Redirect(url)
      {
      document.location = url;
      }

      function SwitchMenu(el)
      {
       var lm = document.getElementById(el);
       if (lm == null) return; 
       if (lm.style.display == 'block')
       {
        lm.style.display = "none";
        opened = null;
       }
       else
       {
        lm.style.display = 'block';
        if (opened!=lm)
        {
         if (opened!=null) opened.style.display = "none";
         opened = lm;
        }        
       }
       
       savemenustate();
      }


    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 var 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;
    }

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


      function onloadfunction(){
       var cookievalue=readCookie("MENU_STATE");     
 
       if (cookievalue!="")
        SwitchMenu(cookievalue);
      }
      
      function savemenustate(){
       eraseCookie("MENU_STATE");
       eraseCookie("PAGE_URL");
       
       if (opened != null)
        createCookie("MENU_STATE",opened.id);
        
       createCookie("PAGE_URL", document.location);
      }    

      createCookie("PAGE_URL", document.location);
      if (document.getElementById)
        window.onunload=savemenustate;