code: function showSignUpForm() {
  	 var modal = document.getElementById('downloadModal');
  
  	// Make sure modal is in the body, not where it was originally deployed.
  	$("body").append($(modal))
  
  	// Get the button that opens the modal
  	 var btn = document.getElementById("downloadBtn");
  
  	// Get the <span> element that closes the modal
  	 var span = document.getElementsByClassName("close")[0];
  
  	// When the user clicks on the button, open the modal
  	 modal.style.display = "block";
  
  	// When the user clicks on <span> (x), close the modal
  	 span.onclick = function () {
  	   modal.style.display = "none";
  	 }
  
  	// When the user clicks anywhere outside of the modal, close it
  	 window.onclick = function (event) {
  	   if (event.target == modal) {
  	     modal.style.display = "none";
  	   }
  	 }
  }
docs: Modal to sign up for newsletter