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我很难在这个出租车费脚本中添加一些额外的内容。它工作正常，但问题是我想添加一个下拉列表或复选框，以便人们可以点击客户数量来计算票价。出租车的起步价将增加 50 美分，每公里增加 20 美分，如果客户乘坐小巴，则每分钟增加 15 美分。我搜索了stackoverflow，但找不到任何好的解决方案。第二件事是我希望人们通过表格向我发送他们的请求。有没有人可以解决这个问题？

这是代码：

        //--------------Settings--------------------------------    
var countrycode="nl"
var rateperkm=1.95;
var rateperminute=0.30;
var ratio=3.19;
var minimum_fare=3.19;
var currencysymbol="€";
var avoidHighways=false;
var avoidTolls=false;
var showsummary=false;
var showroutemap=true;
var apikey="";
//----------End Settings--------------------------------
function initialize()
{
    var options = {componentRestrictions: {country: countrycode}};
    var input = /** @type {HTMLInputElement} */(document.getElementById('inputfrom'));
    var searchBoxfrom = new google.maps.places.Autocomplete(input,options);
    var input = /** @type {HTMLInputElement} */(document.getElementById('inputto'));
    var searchBoxto = new google.maps.places.Autocomplete(input,options);
}

function ftn_estimate()
{
    if (document.getElementById('inputfrom').value!="" && document.getElementById('inputto').value!="")
    {
        var origin = document.getElementById('inputfrom').value;
        var destination = document.getElementById('inputto').value;

        var service = new google.maps.DistanceMatrixService();
        service.getDistanceMatrix(
          {
            origins: [origin],
            destinations: [destination],
            travelMode: google.maps.TravelMode.DRIVING,
            unitSystem: google.maps.UnitSystem.METRIC,
            avoidHighways: avoidHighways,
            avoidTolls: avoidTolls,
          }, callback);
    }
}

function callback(response, status) {
  if (status != google.maps.DistanceMatrixStatus.OK) {
    alert('Error was: ' + status);
  } else {
    var origins = response.originAddresses;
    var destinations = response.destinationAddresses;

    for (var i = 0; i < origins.length; i++) {
      var results = response.rows[i].elements;

      for (var j = 0; j < results.length; j++) {

        if(showsummary)
        {
            document.getElementById('summary').innerHTML=origins[i] + ' to ' + destinations[j]  + ': ' + results[j].distance.text + ' in '+ results[j].duration.text;
            document.getElementById('summary').innerHTML+="<br /><font color='red'>" + disclaimer + "</font>"
        }
        document.getElementById('distance').value=(results[j].distance.value/1000).toFixed(1);
        document.getElementById('time').value=(results[j].duration.value/60).toFixed(1);

        var calc_fare_dist=(results[j].distance.value/1000)*rateperkm;
    var calc_fare_time=(results[j].duration.value/60)*rateperminute;
    // Provided you want to add 0.35 per minute to the "per mile price"
    var calc_fare = (calc_fare_dist + calc_fare_time)+ratio;

        if (calc_fare<minimum_fare)
        {
            calc_fare=minimum_fare;
        }
        document.getElementById('fare').value=currencysymbol+calc_fare.toFixed(2);
      }
    }

    if (showroutemap)
    {
        var origin = document.getElementById('inputfrom').value;
        var destination = document.getElementById('inputto').value;
        getpath(origin,destination);
    }
  }
}
google.maps.event.addDomListener(window, 'load', initialize);


function getpath(a,b) {
  var directionsService = new google.maps.DirectionsService();
  var directionsDisplay = new google.maps.DirectionsRenderer({
    preserveViewport: true
  });

  directionsService.route({
    origin: a,
    destination:b,
    travelMode: google.maps.TravelMode.DRIVING
  }, function(response, status) {
    if (status === google.maps.DirectionsStatus.OK) {
      // directionsDisplay.setDirections(response);
    var polyline = new google.maps.Polyline({
        path: [],
        strokeColor: '#0000FF',
        strokeWeight: 3
      });

    var legs = response.routes[0].legs;

     for (i = 0; i < legs.length; i++) {
        var steps = legs[i].steps;
        for (j = 0; j < steps.length; j++) {
        var nextSegment = steps[j].path;
        for (k = 0; k < nextSegment.length; k++) {
            polyline.getPath().push(nextSegment[k]);
          }
        }
      }

    do{
        var newpath = [];
            for (k = 0; k < polyline.getPath().length; k += 2) {
                newpath.push(polyline.getPath().getAt(k));
            }
            polyline.setPath(newpath);
    }
    while (polyline.getPath().length>1000)

    var path = polyline.getPath();
    var encodeString = google.maps.geometry.encoding.encodePath(path);


       document.getElementById('mapspan').innerHTML='<center><img src="https://maps.googleapis.com/maps/api/staticmap?size=400x400&path=weight:3%7Ccolor:red%7Cenc:'+encodeString+'&key='+apikey+'" /></center>';

    } else {
      window.alert('Directions request failed due to ' + status);
    }
  });
}
</script>
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