<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script data-class="radarioButtonScript" src="https://radario.ru/scripts/widget/buy-button-widget.js"></script>
</head>
<body class="grid">
<div class="grid tickets" id="tickets">
а вот это ссылка
<a onclick="openBuyPopup()" href="#tickets">Купить билет</a>
</div>
<script>
function openBuyPopup() {
var opt = { id: 453795, forgetOriginalHash: true };
radario.openBuyPopup(opt);
}
window.onload = function() {
if (location.hash === '#tickets') {
openBuyPopup();
}
};
</script>
</body>
</html>