<body>
<input type='button' value='Returns with BoxNow' onclick='redirectPage()' />
</body>
<script>
<!--Here are the three values that you need to pass to our URL-->
let redirectPage = () => {
let v1 = '<-- Here goes your Partner ID -->';
let v2 = '<-- Here goes your Warehouse Location ID -->';
let v3 = '<-- Here goes your E-SHOP name -->';
const url = "https://boxnow.hr/returns-step-one/" + v1 + "/" + v2 + "/" + v3;
window.location.href = url;
}
</script>