HTML and CSS Reference
But I haven't applied the three classes shown earlier to anything yet, so what
var submit = document.getElementById(“submit”);
var form = document.querySelector(“form”);
var back = document.getElementById(“back”);
var h1 = document.querySelector(“h1”);
TIP: querySelector and addEventListener are not sup-
ported by IE versions earlier than version 9. Therefore, for
IE 6-8 support, you'll need to consider using different code.
Here, references to elements are stored on the page in the following variables:
submit . The <input id= ” submit ” >
form . The <form> element
back . The back face of the form; the <div> with the #back attribute
h1 . The <h1> element
Next, I set up two event listeners:
submit.addEventListener(“click”, rotateForm, false);
h1.addEventListener(“click”, formOut, false);
First line. Adds an event listener to the submit variable reference, which
executes the rotateForm function when the Submit button is clicked.
Second line. Adds an event listener to the h1 variable reference, which
executes the formOut function when the <h1> element is clicked.