function openclose(id_p) {
 if (document.getElementById(id_p).style.display == "block") {
   document.getElementById(id_p).style.display = "none";
 } else {
   document.getElementById(id_p).style.display = "block";
 }
}

function answer(unitId) {
  $('a[href="#answer'+unitId+'"]').click();
  document.location = "/answers#answer"+unitId;
}

$(document).ready(function(){
  var match = document.location.toString().match(/\/answers#answer(\d+)/);
  if(match) answer(match[1]);
});