var zichtbaar = -1;
   var todostring;

   function doeSchuif_1()
   {
   document.getElementById('eentd_ID').value = document.getElementById('tweetd_ID').value;
   doeSchuif_2();
   }
   function doeSchuif_2()
   {
   document.getElementById('tweetd_ID').value = document.getElementById('drietd_ID').value;
   doeSchuif_3();
   }
   function doeSchuif_3()
   {
   document.getElementById('drietd_ID').value = document.getElementById('viertd_ID').value;
   doeSchuif_4();
   }
   function doeSchuif_4()
   {
   document.getElementById('viertd_ID').value = document.getElementById('vijftd_ID').value;
   doeSchuif_5()
   }
   function doeSchuif_5()
   {
   document.getElementById('vijftd_ID').value = document.getElementById('zestd_ID').value;
   doeSchuif_6()
   }
   function doeSchuif_6()
   {
   document.getElementById('zestd_ID').value = document.getElementById('zeventd_ID').value;
   doeSchuif_7()
   }
   function doeSchuif_7()
   {
   document.getElementById('zeventd_ID').value = document.getElementById('achttd_ID').value;
   doeSchuif_8()
   }
   function doeSchuif_8()
   {
   document.getElementById('achttd_ID').value = " ";
   doe_save_todo()
   }



   function doe_bij_enter(event,wie)
   {
   if(event.keyCode=="13")
        {
        if(wie=="1")document.getElementById('tweetd_ID').focus();
        if(wie=="2")document.getElementById('drietd_ID').focus();
        if(wie=="3")document.getElementById('viertd_ID').focus();
        if(wie=="4")document.getElementById('vijftd_ID').focus();
        if(wie=="5")document.getElementById('zestd_ID').focus();
        if(wie=="6")document.getElementById('zeventd_ID').focus();
        if(wie=="7")document.getElementById('achttd_ID').focus();
        if(wie=="8")document.getElementById('achttd_ID').blur();
        doe_save_todo()
        }
   }


   function doe_save_todo( dagen )
   {
   todostring=document.getElementById('eentd_ID').value + "$1$" + document.getElementById('tweetd_ID').value + "$2$";
   todostring=todostring + document.getElementById('drietd_ID').value + "$3$" + document.getElementById('viertd_ID').value;
   todostring=todostring + "$4$" + document.getElementById('vijftd_ID').value;
   todostring=todostring + "$5$" + document.getElementById('zestd_ID').value;
   todostring=todostring + "$6$" + document.getElementById('zeventd_ID').value;
   todostring=todostring + "$7$" + document.getElementById('achttd_ID').value;

   var td_exdate=new Date();
   td_exdate.setDate(td_exdate.getDate() + 14 );
   document.cookie="ToDo=" +escape(todostring)+";expires="+td_exdate.toGMTString();

   document.getElementById('notebookID').src = "http://www.vandelden.info/afb/notebook_check.gif";
   }


   function doe_lees_todo()
   {
   if (document.cookie.length>0)
       {
       c_name="ToDo"; 
       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;
          todo_content=unescape(document.cookie.substring(c_start,c_end));

          AU_todo();
          document.getElementById('notebookID').src = "http://www.vandelden.info/afb/notebook_check.gif";

          document.getElementById('eentd_ID').value = todo_content.substring(0,todo_content.indexOf("$1$"));
          document.getElementById('tweetd_ID').value = todo_content.substring(todo_content.indexOf("$1$")+3,todo_content.indexOf("$2$"));   
          document.getElementById('drietd_ID').value = todo_content.substring(todo_content.indexOf("$2$")+3,todo_content.indexOf("$3$"));
          document.getElementById('viertd_ID').value = todo_content.substring(todo_content.indexOf("$3$")+3,todo_content.indexOf("$4$"));
          document.getElementById('vijftd_ID').value = todo_content.substring(todo_content.indexOf("$4$")+3,todo_content.indexOf("$5$"));
          document.getElementById('zestd_ID').value = todo_content.substring(todo_content.indexOf("$5$")+3,todo_content.indexOf("$6$"));          
          document.getElementById('zeventd_ID').value = todo_content.substring(todo_content.indexOf("$6$")+3,todo_content.indexOf("$7$"));
          document.getElementById('achttd_ID').value = todo_content.substring(todo_content.indexOf("$7$")+3);

          } 
       }
   return "";

   }


   function AU_todo()
     
   {
   if(zichtbaar == -1)
      {
      changeClass('todo','todo_P');
      zichtbaar = 1; 
      }
   else
      {
      changeClass('todo','dis_nee');
      document.getElementById('notebookID').src = "http://www.vandelden.info/afb/notebook.gif";
      var td_exdate=new Date();
      td_exdate.setDate(td_exdate.getDate() - 30 );
      document.cookie="ToDo=" +escape(todostring)+";expires="+td_exdate.toGMTString();
      zichtbaar = -1;
      document.getElementById('eentd_ID').value = "Tik je ToDo’s";
      document.getElementById('tweetd_ID').value =  " ";   
      document.getElementById('drietd_ID').value = " ";
      document.getElementById('viertd_ID').value = " ";
      document.getElementById('vijftd_ID').value = " ";
      document.getElementById('zestd_ID').value = " ";          
      document.getElementById('zeventd_ID').value = " ";
      document.getElementById('achttd_ID').value = " ";

      } 

   }


  function doeherstel(){ zichtbaar = -1; }