Jquery

유용한 Youtube Tip : https://www.youtube.com/watch?v=uwn3Y4xzOcw&list=PL-qMANrofLyu4HcK14ntl-o7d-eHxo7-U

.eq( )

// JavaScript
document.getElementsByClassName("클래스명")[0]
document.getElementsByClassName("클래스명")[3]

// JQuery
$(".클래스명").eq[0]