console.log(param.parentNode.parentNode.lastChild);
console.log(param.parentNode.parentNode.lastChild.previousSibling);
console.log(param.parentNode.parentNode.lastChild.previousSibling.previousSibling);
console.log(param.parentNode.parentNode.lastChild);
console.log(param.parentNode.parentNode.lastChild.previousSibling);
console.log(param.parentNode.parentNode.lastChild.previousSibling.previousSibling);