Pre-Fill Radio Buttons & Checkbox Fields with URL Parameters

radio_buttons.js

<script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
<script>
    var dataObj = {};
    var data = document.location.search.substr(1);
    $.each(data.split("&"), function () {
        var el = this.split("="),
                elName = decodeURIComponent(el[0]),
                elVal = el.length > 1 ? decodeURIComponent(el[1]) : null;
        if (!(elName in dataObj)) {
            dataObj[elName] = [];
        }
        dataObj[elName].push(elVal);
    });

    $(":input").each(function () {
        if (!($(this).attr("name") in dataObj)) {
            this.checked = false;
        }
    });

    $.each(dataObj, function (i, val) {
        $("[name='" + i + "']").val(val);
    });
</script>