/*!
 * http://allabout.co.jp/internet/hpcreate/closeup/CU20090213A/index4.htm/
 */
function ShowCBox( boxid ) {
   var target = document.getElementById(boxid);
   if( target.style.display != "block" ) {
      target.style.display = "block";
   }
   else {
      target.style.display = "";
   }
}
function HideCBox( boxid ) {
   var target = document.getElementById(boxid);
   if( target.style.display != "none" ) {
      target.style.display = "none";
   }
   else {
      target.style.display = "";
   }
}