Redirection via Javascript (Add this to any HTML page, and it will direct to a given 'next' url param)

page.html

<script type="text/javascript">
    var getUrlParameter = function getUrlParameter(sParam) {
        var sPageURL = decodeURIComponent(window.location.search.substring(1)),
            sURLVariables = sPageURL.split('&'),
            sParameterName,
            i;

        for (i = 0; i < sURLVariables.length; i++) {
            sParameterName = sURLVariables[i].split('=');

            if (sParameterName[0] === sParam) {
                return sParameterName[1] === undefined ? true : sParameterName[1];
            }
        }
    };
    if getUrlParameter('next') {
        window.location = getUrlParameter('next') + window.location.hash;
    }
</script>