<span class="radioVNC">
    <input type="radio" name="EventSet" value="VNC"/>VNC
</span>
<br>
<span class="radioOLV">
    <input type="radio" name="EventSet" value="OLV"/>OLV
</span>
<br>
<span class="radioAct">
    <input type="radio" name="EventSet" value="Activity"/>Activity
</span>

$(document).ready(function () {
var curResType = $('input[title="ReservationType2"]').val();
        $('input:radio[name="EventSet"]').each(function () {

            var radioVal = $('input[name="EventSet"]').val()
            if (radioVal == curResType) {
                $(this).prop('checked', true);
            }
})
});