Javascript/parentNode

解説 指定したノードの親要素を指定。
sample1
siDiv

s1p

s1p

  • s1Li
  • s1Li
sample1code 
var s1Ul = document.getElementById("s1Ul");
console.log(s1Ul.parentNode.id)
sample2
s2Div

s2p

sample2code 
function s2Func(){
  var s2p = document.getElementById("s2p");
  var aaa = s2p.parentNode;
  aaa.style.border = "2px dashed blue";
}