diff --git a/ohms-law_a11y_view.html b/ohms-law_a11y_view.html
index ee0a6a7..cdc22b9 100644
--- a/ohms-law_a11y_view.html
+++ b/ohms-law_a11y_view.html
@@ -262,17 +262,14 @@
PDOM & Descriptions for Ohm's Law
if ( data.type === 'load' ) {
var simFrame = document.getElementById( 'iframe' );
- var innerDoc = simFrame.contentDocument || simFrame.contentWindow.document;
+ var innerWindow = simFrame.contentWindow;
// copy of the parallel DOM
- var PDOMRoot = simFrame.contentWindow.phet.joist.sim.display.accessibleDOMElement;
+ var PDOMRoot = innerWindow.phet.joist.sim.display.accessibleDOMElement;
var PDOMCopy = PDOMRoot.cloneNode( true );
// get the alert dom elements from the iframe's inner document
- var politeElement1 = innerDoc.getElementById( 'elements-1-polite-1' );
- var politeElement2 = innerDoc.getElementById( 'elements-1-polite-2' );
- var politeElement3 = innerDoc.getElementById( 'elements-1-polite-3' );
- var politeElement4 = innerDoc.getElementById( 'elements-1-polite-4' );
+ var ariaLiveElementsContainer = innerWindow.phet.joist.sim.display.utteranceQueue.getAriaLiveContainer();
// get the alert dom elements from the PDOM copy
var alertList = document.getElementById( 'alert-list' );
@@ -430,10 +427,9 @@ PDOM & Descriptions for Ohm's Law
}
// observe each of the live elements and add new text content to the list view
- addLiveObserver( politeElement1, alertList );
- addLiveObserver( politeElement2, alertList );
- addLiveObserver( politeElement3, alertList );
- addLiveObserver( politeElement4, alertList );
+ for ( let i = 0; i < ariaLiveElementsContainer.children.length; i++ ) {
+ addLiveObserver( ariaLiveElementsContainer.children[ i ], alertList );
+ }
// set focus to the loaded iframe
document.getElementById( 'iframe' ).focus();