document.addEventListener('DOMContentLoaded', function() {
var toggleSoundButton = document.querySelector('.toggle_sound');
var icon = document.querySelector('.toggle_sound i');
var heroBackgroundVideo = document.querySelector('.video video');
toggleSoundButton.addEventListener('click', function (event) {
if (heroBackgroundVideo.muted !== false){
	 
heroBackgroundVideo.muted=false;
icon.classList.add("fa-volume-up");
} else {
	 
heroBackgroundVideo.muted=true;
icon.classList.remove("fa-volume-up");
} }); });