Can multiple different HTML elements have the same ID if they're different elements?

Question

Can multiple HTML elements have the same ID if they\'re of different element types? Is a scenario like this valid? Eg:

div#foo
span#foo
a#foo

Answer 1

first text for one
second text for one

var ids = document.getElementById('one');

ids contain only first div element. So even if there are multiple elements with the same id, the document object will return only first match.