-1
在我的程序中，我編寫了幾個函數，當您鍵入任意數量的票證持有人和補充通行證時，從1到550，之後，當您單擊按鈕「計算可用座位」時，它將顯示：「The可用座位的數量是「然後555減去持票人和補充通行證的數量。但是，用我現在的代碼，當我用兩個隨機數鍵入兩個空白框後，然後點擊按鈕「計算可用座位」時，它總是返回「可用座位數爲555」。我希望該計劃第一減去票持有者的兩個值，並從555（關於該飛機座位的最大數量）通過並顯示值，而不僅僅是555爲什麼我的函數不能從空白輸入框中獲取值並執行正確的函數？
var TicketHolders = parseInt(document.getElementById("txtTickets").value) || 0;
var ComplementaryPasses = parseInt(document.getElementById("txtPasses").value) || 0;
function number_of_available_seats(TicketHolders, ComplementaryPasses) {
var answer = 555 - (TicketHolders + ComplementaryPasses);
\t return("The number of available seats is " + answer);
}
var button = document.getElementById("btnSubmit");
function showresults(TicketHolders, ComplementaryPasses) {
\t document.getElementById("results").innerHTML = number_of_available_seats(TicketHolders, ComplementaryPasses);
}
function clickonbutton(){
showresults(TicketHolders, ComplementaryPasses);
}
button.onclick = function() {
clickonbutton();
};<!-- airbus.html -->
<html lang="en">
<head>
<meta charset="utf-8">
<title>Airbus Seat Calculator</title>
<style>
DIV.movable { position:absolute;}
</style>
</head>
<body>
<h2>Airbus Seat Calculator</h2>
<form id="formTest" method="get" action="processData">
<table>
<tr>
<td><label for="txtTickets">Ticket Holders<span class="inputs"></span></label></td>
<td><input type="text" id="txtTickets" name="tickets"></td>
</tr>
<tr>
<td><label for="txtPasses">Complementary Passes<span class="inputs"></span></label></td>
<td><input type="text" id="txtPasses" name="passes"></td>
</tr>
<tr>
<td> </td>
<td>
<input type="button" value="Calculate Available Seats" id="btnSubmit"></td>
</tr>
</table>
</form>
<div id="results"> \t
</div>
<h2>Your Copyright Info Goes Here</h2>
<script src="airbus.js">
</script>
</body>
</html>