function hide(id){
      document.getElementById(id).style.display = 'none';
   }
   function show(id){
      document.getElementById(id).style.display = '';
   }
   function spoilerhide(){
      for (i=0;i<document.getElementsByTagName('div').length;i++) {
         if (document.getElementsByTagName('div')[i].className == 'spoiler') {
            document.getElementsByTagName('div')[i].style.color = '#000000';
         }
      }
   }
   function spoilershow(){
      for (i=0;i<document.getElementsByTagName('div').length;i++) {
         if (document.getElementsByTagName('div')[i].className == 'spoiler') {
            document.getElementsByTagName('div')[i].style.color = '#FFFFFF';
         }
      }
   }