drowdown menu using JS

Question

var x=document.getElementById("click");
x.onclick=dropme();
function dropme(){
var y=document.getElementByClassName("change")
y.style.display="block";
}

i think i am missing something to update it.

Answer 1

It is:

var y = document.getElementsByClassName("change")[0];
y.style.display = "block";

We use Elements because there could be many elements with same class name.
And we also need to index the element we are dealing with.