As you can see down there I am trying to make Select Option with time. But I want don’t want to allow when someone selected maybe 10:00 o’clock that he/she can also select at teh other Select Option 10:00 o’clock or earlier is there a way to fix this with Javascript?
<div class="pop" id="pop1">
<div class="popinner">
<h3>Normale Büros</h3>
<p>Start Uhrzeit:</p>
<select name="Urhzeit" id="time1" type="submit">
<option value="t1">08:00</option>
<option value="t2">09:00</option>
<option value="t3">10:00</option>
<option value="t4">11:00</option>
<option value="t5">12:00</option>
<option value="t6">13:00</option>
<option value="t7">14:00</option>
<option value="t8">15:00</option>
<option value="t8">16:00</option>
</select>
<p>End Uhrzeit:</p>
<select name="Urhzeit" id="time2" type="submit">
<option value="t1">09:00</option>
<option value="t2">10:00</option>
<option value="t3">11:00</option>
<option value="t4">12:00</option>
<option value="t5">13:00</option>
<option value="t6">14:00</option>
<option value="t7">15:00</option>
<option value="t8">16:00</option>
<option value="t8">17:00</option>
</select>
</div>
<button type="button" onclick="normalesBuchen()" class="btnpop1" href="#">Buchen</button>