This was the JS that was embedded in the old Access-A-Ride Reservation page. All of the inputs were checked client-side and never server-side

old_aar.js

document.myForm.cmbPCA.value = '1';document.myForm.cmbPCA.disabled = false;document.myForm.chkAnimal.checked = false;document.myForm.chkAnimal.disabled = true;document.myForm.cmbXWide.value = 'No';

  function cmdSubmit_OnClick() {

    document.myForm.txtEquipment.value = getSelected(document.myForm.lstEquipment);
    var myDate = new Date();
    myDate.setDate(myDate.getDate()); 
    var myHour = myDate.getHours();
    var myTripDate = new Date(document.myForm.cmbTripDate.value);

    if (1 == 0)
      alert("Your eligibility has expired. Please call our Eligibility Department at 1-877-337-2017 to schedule a recertification appointment for your Access-A-Ride Service.");
    else if (document.myForm.txtPickAddress.value == "")
      alert("Invalid Pickup Address");
    else if (document.myForm.txtPickPhone.value == "")
      alert("Invalid Pickup Phone #");
    else if (document.myForm.txtDropAddress.value == "")
      alert("Invalid Dropoff address");
    else if (document.myForm.txtDropPhone.value == "")
      alert("Invalid Drop Off Phone #");
    else if (document.myForm.cmbTripDate.value == "")
      alert("Invalid Trip Date");
    else if (document.myForm.cmbAnchor.value == "")
      alert("Invalid Request Type");
    else if (document.myForm.cmbRequestTimeHH.value == "" || document.myForm.cmbRequestTimeMM.value == "")
      alert("Invalid Request Time");
    else if (myTripDate < myDate || myHour >= 15) 
      alert("Online reservations closes at 3:00 pm.  To schedule your trip, please call AAR Reservations at 1-877-337-2017.");
    else if (document.myForm.cmbAnchor.value == "P" && document.myForm.cmbRequestTimeAMPM.value == "AM" && (document.myForm.cmbRequestTimeHH.value <= "03" || document.myForm.cmbRequestTimeHH.value == "12"))
      alert("For trip request between 12am and 4am, please call AAR Reservations at 1-877-337-2017.  Thank you.");
    else if (document.myForm.cmbAnchor.value == "A" && document.myForm.cmbRequestTimeAMPM.value == "AM" && (document.myForm.cmbRequestTimeHH.value <= "04" || document.myForm.cmbRequestTimeHH.value == "12"))
      alert("For trip request between 12am and 4am, please call AAR Reservations at 1-877-337-2017.  Thank you.");
    else {
      document.myForm.cmbPCA.disabled = false;
      document.myForm.chkAnimal.disabled = false;
      document.myForm.submit();
    }
  }

  function getSelected(myList) {
    var mySelected = '';
    var index = 0;
    for (var i=0; i < myList.length; i++) {
      if (myList[i].selected) {
        if (mySelected.length != 0) {
          mySelected = mySelected + ',';
        }
        mySelected = mySelected + myList[i].value;
      }
    }
    return mySelected;
  }

  function cmbAnchor_OnChange() {
    if (document.myForm.cmbAnchor.value == "A") {
      document.myForm.cmbServiceWindowID.value = 3;
      document.myForm.cmbServiceWindowID.disabled = true;
    } else {
      document.myForm.cmbServiceWindowID.disabled = false;
    }
  }