見え隠れするコード領域

toggleMyCode.js

<script type="text/javascript">
 function getNS(children, target, found, index){
   if(children.length == index){return null;}
   if(found){return children[index];}
   if(target == children[index]){found=true;}
   return getNS(children, target, found, index+1);
 }
 function toggleMyCode(me){
   var item = getNS(me.parentElement.children, me, false, 0);
   if(!item){ return; }
   var style = item.style;
   if('none' == style.display){
     style.display = 'block';
   }else{
     style.display = 'none';
   }
 }
</script>