Is there any way to add to the first field that they can't choose a time that is BEFORE their computer's current time?

```
<label>What is the earliest Pickup time?</label><select name='PickupTime' required>
    <option value='' selected='selected'>(Select a Time)</option> 
    <option value='08:00:00'>8:00 AM</option>
    <option value='08:30:00'>8:30 AM</option>
    <option value='09:00:00'>9:00 AM</option>
    <option value='09:30:00'>9:30 AM</option>
    <option value='10:00:00'>10:00 AM</option>
    <option value='10:30:00'>10:30 AM</option>
    <option value='11:00:00'>11:00 AM</option>
    <option value='11:30:00'>11:30 AM</option>
    <option value='12:00:00'>12:00 PM</option>
    <option value='12:30:00'>12:30 PM</option>
    <option value='13:00:00'>1:00 PM</option>
    <option value='13:30:00'>1:30 PM</option>
    <option value='14:00:00'>2:00 PM</option>
</select>
<label>What is the latest Pickup time?</label><select name='CloseTime' required>
    <option value='' selected='selected'>(Select a Time)</option> 
    <option value='10:00:00'>10:00 AM</option>
    <option value='10:30:00'>10:30 AM</option>
    <option value='11:00:00'>11:00 AM</option>
    <option value='11:30:00'>11:30 AM</option>
    <option value='12:00:00'>12:00 PM</option>
    <option value='12:30:00'>12:30 PM</option>
    <option value='13:00:00'>1:00 PM</option>
    <option value='13:30:00'>1:30 PM</option>
    <option value='14:00:00'>2:00 PM</option>
    <option value='14:30:00'>2:30 PM</option>
    <option value='15:00:00'>3:00 PM</option>
    <option value='15:30:00'>3:30 PM</option>
    <option value='16:00:00'>4:00 PM</option>
    <option value='16:30:00'>4:30 PM</option>
</select>

```

this is my current code and I think because i want it to be based on computer time not my server time it has to be in javascript not php.

I currently have 2 select fields. The first is my pickup time and this is what i want users to not be able to choose anything earlier than the current hour based on their time zone. I want the earliest pickup to be 8 am all the same as that's as early as pickups can be.

I hope his make sense.