问基于两个下拉列表和一个文本框字段计算费用的jQuery IF语句

EN

//Calculate Months
(function() {
    var monthsToGo;
    var Fee = makeStruct("monthSect vehicleBody ewSect price");
    var fees = [
        new Fee(/*monthSect*/2, /*vehicleBody*/0, /*ewSect*/0, /*price*/45.10),
        new Fee(3, 1, 0, 55.10),
        new Fee(4, 2, 0, 65.10),
        new Fee(13, 3, 0, 75.10),
        new Fee(14, 4, 0, 85.10),
        new Fee(15, 5, 0, 95.10)
    ];

    $(document).ready(function() {
        $('#month2, #month3').hide();
    });
    
    $(document).on('change', '#ownership input', function(){
        calculateTotal();
        //statedropDown($(this).val());
    });
    
    $(document).on('change', '#month1', function() {
        // ignore blank options
        if ($(this).val() == '') { return; }
        
        var vehicle = $('#vehiclebody').val();
        var ew = $('#ew').val();
        var ewSect = 0;
        var monthSect = 0;
        var titleFees = 0;
        
        if(vehicle == '' || ew == ''){
            alert('Please enter Vehicle Type and/or Empty Weight');
            $(this).val('');
            return;
        }
        
        var today = new Date();
        var birthdate = new Date();
        birthdate.setMonth($('#month1').val());

        monthsToGo = (today.getMonth() < birthdate.getMonth())
            ? birthdate.getMonth() - today.getMonth()
            : (12 - today.getMonth()) + birthdate.getMonth()
        ;
        
        $('#month2').hide();
        $('#month3').hide();

        if (monthsToGo == 1) {
            this.monthsToGo = 13;
            alert(this.monthsToGo);
        } else if (monthsToGo == 2) {
            $('#month2').show();
        } else if (monthsToGo == 3) {
            $('#month3').show();
        } else {
            this.monthsToGo = monthsToGo;
            alert(this.monthsToGo);
        }
        
        if(monthsToGo >= 4 || monthsToGo <= 12){
            monthSect = 4;
            //Set monthsToGo to 4 if it is in this range for the linked list so
            //categorizing is easier
            //6 possibilities for dates -- 2, 3, 4, 13, 14, 15
        }
        else monthSect = monthsToGo;
        
        switch(vehicle){
            case 0://2dr
            case 2://4dr
            case 4://convertible
            case 5://van
                if(ew < 2500) ewSect = 0;
                else if(ew >= 2500 && ew < 3500) ewSect = 1;
                else if(ew >= 3500) ewSect = 2;
                break;
            case 1://pickup
                if(ew < 2000) ew = 0;
                else if(ew >= 2000 && ew <= 3000) ewSect = 1;
                else if(ew > 3000 && ew <= 5000) ewSect = 2;
                break;
            case 3://trucks
                if(ew > 5000 && ew < 6000) ewSect = 0;
                else if(ew >= 6000 && ew < 8000) ewSect = 1;
                else if(ew >= 8000 && ew < 10000) ewSect = 2;
                else if(ew >= 10000 && ew < 15000) ewSect = 3;
                else if(ew >= 15000 && ew < 20000) ewSect = 4;
                else if(ew >= 20000 && ew <= 26000) ewSect = 5;
                else if(ew > 26000 && ew < 35000) ewSect = 6;
                else if(ew >= 35000 && ew < 44000) ewSect = 7;
                else if(ew >= 44000 && ew < 55000) ewSect = 8;
                else if(ew >= 55000 && ew < 62000) ewSect = 9;
                else if(ew >= 62000 && ew < 72000) ewSect = 10;
                else if(ew >= 72000 && ew <= 8000) ewSect = 11;
                break;
        }
        
        console.log('Month Section (monthSect): ' + monthSect + '; Vehicle: ' + vehicle + '; EW Section (ewSect): ' + ewSect);
        
        for(var i = 0; i < fees.length; i++){
            console.log('infor');
            if(fees[i].monthSect == monthSect && fees[i].vehicleBody == vehicle && fees[i].ewSect == ewSect) {
                titleFees = getProofOfOwnership() + fees[i].price;
                console.log('Title Found! ' + titleFees);
                $('#totalPrice').text('Estimated Transfer Fees $' + titleFees);
                break;
            }
        }
        
    });

    $('#month2, #month3').on('change', function() {
        this.monthToGo = $(this).val();
        alert(this.monthToGo);
    });
    
}($))

//Fee Calculator
//Setting Proof of Ownership Prices
 //Set up an associative array
 var title_prices = new Array();
 title_prices["MCO"]=68.25;
 title_prices["FL Title"]=78.25;
 title_prices["OOS Title"]=88.25;
 
 // Proof of Ownership Radio Buttons
function getProofOfOwnership()
{  
    var proofOfOwnership=0;
    //Get a reference to the form id="form"
    var theForm = document.forms["form"];
    //Get a reference to the title the user Chooses name=ownerShip":
    var ownerShip = theForm.elements["ownership"];
    //Here since there are 4 radio buttons ownerShip.length = 4
    //We loop through each radio buttons
    for(var i = 0; i < ownerShip.length; i++)
    {
        //if the radio button is checked
        if(ownerShip[i].checked)
        {
            proofOfOwnership = title_prices[ownerShip[i].value];
            //If we get a match then we break out of this loop
            //No reason to continue if we get a match
            break;
        }
    }
    //We return the proofOfOwnership
    return proofOfOwnership;
}
function calculateTotal()
{

    var titleFees = getProofOfOwnership();
    


    var divobj = document.getElementById('totalPrice');
    divobj.style.display='block';
    divobj.innerHTML = "Estimated Transfer Fees $"+titleFees;

}

function hideTotal()
{
    var divobj = document.getElementById('totalPrice');
    divobj.style.display='none';
}

function makeStruct(names) {
  var names = names.split(' ');
  var count = names.length;
  function constructor() {
    for (var i = 0; i < count; i++) {
      this[names[i]] = arguments[i];
    }
  }
  return constructor;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<form name="form">
    <div id="ownership">
        <label class='radiolabel'><input type="radio"  name="ownership" required="yes" message="Please select proof of ownership." value="MCO"/>Manufacturer's Statement of Origin&nbsp;&nbsp;</label><br/>
        <label class='radiolabel'><input type="radio"  name="ownership" value="FL Title"/>Florida Certificate of Title&nbsp;&nbsp;</label><br/>
                <label class='radiolabel'><input type="radio"  name="ownership" value="OOS Title"/>Out-of-state Certificate of Title&nbsp;&nbsp;</label>
        </div>

    <br/>
    <br/>

<label for='month1'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Calculate Months:</label>
<select name="month1" id="month1" size="1">
    <option value="">Choose a Month</option>
    <option value="0">January</option>
    <option value="1">February</option>
    <option value="2">March</option>
    <option value="3">April</option>
    <option value="4">May</option>
    <option value="5">June</option>
    <option value="6">July</option>
    <option value="7">August</option>
    <option value="8">September</option>
    <option value="9">October</option>
    <option value="10">November</option>
    <option value="11">December</option>
</select>
<select name="month2" id="month2" size="1">
    <option value="">Choose an Option</option>
    <option value="2">2</option>
    <option value="14">14</option>
</select>
<select name="month3" id="month3" size="1">
    <option value="">Choose an Option</option>
    <option value="3">3</option>
    <option value="15">15</option>
</select>
    <br/>
    

<select name="vehiclebody" id="vehiclebody" required="yes" message="Please select body." size="1">
    <option value="">Choose a Vehicle</option>
    <option value="0">2Dr</option>
    <option value="1">Pickup</option>
    <option value="2">4dr</option>
    <option value="3">Truck</option>
    <option value="4">Convertible</option>
    <option value="5">Van</option>
</select>

<label for="ew">Empty Weight:</label>
    <input type="text" name="ew" id="ew"/>
    <br/>
    <br/>
    <div id="totalPrice"></div>
</form>