我在哪里,我要创造出使用JavaScript/AJAX需要和“加息”的“贷款数额”来计算每月支付抵押贷款计算器处理作业。在“量” &“利息”是由用户填写,每月的还款额是在PHP程序计算并送回了“支付”领域。的Javascript:提交按钮W /证实的隐藏字段值
我需要验证用户输入并同时获得“支付”字段显示计算支付。
现在,我怎么把它编码当我按下提交验证正确,但计算支付值显示一个单独的页面(PHP页面是除了打印线空白)上。
这里是我的HTML网页代码:
<link rel="stylesheet" type="text/css" href="css/king.css" />
<script>
var XMLHttpRequestObject = false;
if (window.XMLHttpRequest) {
XMLHttpRequestObject = new XMLHttpRequest();
} else if (window.ActiveXObject) {
XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
}
function calculateRate()
{
if(XMLHttpRequestObject) {
XMLHttpRequestObject.open("POST", "assignment_8_calculate.php");
XMLHttpRequestObject.setRequestHeader('Content-Type',
'application/x-www-form-urlencoded');
XMLHttpRequestObject.onreadystatechange = function()
{
if (XMLHttpRequestObject.readyState == 4 &&
XMLHttpRequestObject.status == 200) {
var returnedData = XMLHttpRequestObject.responseText;
var payment = document.getElementById('payment');
payment.value = returnedData;
}
}
var amount = document.getElementById('amount').value;
var interest = document.getElementById('interest').value;
XMLHttpRequestObject.send(amount);
XMLHttpRequestObject.send(interest);
}
return false;
}
function validateForm()
{
var errmsg = '';
var amount = document.getElementById('amount').value;
if (amount == null || amount == "")
{
errmsg += "<br />You must enter an 'Amount Financed'";
} else {
if (isNaN(amount))
{
errmsg += "<br />'Amount Financed' must be a number";
}
}
var interest = document.getElementById('interest').value;
if (interest == null || interest == "")
{
errmsg += "<br />You must enter an 'Interest Rate'";
} else {
if (isNaN(interest))
{
errmsg += "<br />'Interest Rate' must be a number";
}
}
var messageDiv = document.getElementById('messagediv');
messageDiv.innerHTML = errmsg;
if (errmsg == '')
{
return true;
} else {
return false;
}
}
</script>
</head>
<body>
<body>
<a href="assignment_8.php"><img src="images/KingLogo.jpg"></a><br>
<div id="mortgagecalculatorresults">
<h2>Mortgage Calculation</h2>
<div id="calculator">
<form id="mortgage" method="post" action="assignment_8_calculate.php">
<table>
<tr>
<td>Amount Financed:</td>
<td><input type="text" name="amount" id="amount" ></td>
</tr>
<tr>
<td>Interest Rate:</td>
<td><input type="text" name="interest" id="interest" ></td>
</tr>
<tr>
<td>Calculated Monthly Payment:</td>
<td><input type="text" disabled="disabled" name="payment" id="payment" ></td>
</tr>
</table>
<p><input type="submit" value="Calculate Payment" onclick="return validateForm()" onsubmit=" calculateRate();">
<input type="reset" />
</p>
</form>
</div>
<div style="color: red;" id="messagediv">
</div>
</body>
</html>
我也试过在一个发送发送值到PHP程序是这样的:
var sendValues = amount + '|' + interest;
XMLHttpRequestObject.send(sendValues);
这里对于PHP页面的代码(请注意,在代码中被注释掉了,当我试图实例发送只有一个值和我的PHP内爆炸的话):
<?php
//$sendValues = $_POST['sendValues'];
$amount = $_POST['amount'];
$interest = $_POST['interest'];
//list($amount, $interest) = explode('|', $sendValues);
$payment = ($amount * $interest)/12;
//$payment = $sendValues/12;
$payment = number_format ($payment, 2);
print $payment;
?>
如果我只是一个按钮的代码的按钮,而不是一个提交,与直接连接到claculateRate功能,以及跳过无用的值返回到隐藏字段,而不发送到单独的PHP页面的验证,但价值发送将始终为0.00。
谢谢!!!
更新的代码:不工作 - 收到错误:
“不允许的方法
请求的POST方法是不允许的URL /testfiles/Ungar_Bradley_1585_PHPwithMySQL/assignment_8_mortgage.html”
如果我只是改变“按钮”类型的“提交”然后我得到的“支付”领域,其中值是要返回到0.00的值。
<html>
<head>
<link rel="stylesheet" type="text/css" href="css/king.css" />
<script>
var XMLHttpRequestObject = false;
if (window.XMLHttpRequest) {
XMLHttpRequestObject = new XMLHttpRequest();
} else if (window.ActiveXObject) {
XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
}
function calculateRate()
{
if(XMLHttpRequestObject) {
XMLHttpRequestObject.open("POST", "assignment_8_calculate.php");
XMLHttpRequestObject.setRequestHeader('Content-Type',
'application/x-www-form-urlencoded');
XMLHttpRequestObject.onreadystatechange = function()
{
if (XMLHttpRequestObject.readyState == 4 &&
XMLHttpRequestObject.status == 200) {
var returnedData = XMLHttpRequestObject.responseText;
var payment = document.getElementById('payment');
payment.value = returnedData;
}
}
var amount = document.getElementById('amount').value;
var interest = document.getElementById('interest').value;
XMLHttpRequestObject.send(amount);
XMLHttpRequestObject.send(interest);
}
return false;
}
function validateForm()
{
var errmsg = '';
var amount = document.getElementById('amount').value;
if (amount == null || amount == "")
{
errmsg += "<br />You must enter an 'Amount Financed'";
} else {
if (isNaN(amount))
{
errmsg += "<br />'Amount Financed' must be a number";
}
}
var interest = document.getElementById('interest').value;
if (interest == null || interest == "")
{
errmsg += "<br />You must enter an 'Interest Rate'";
} else {
if (isNaN(interest))
{
errmsg += "<br />'Interest Rate' must be a number";
}
}
var messageDiv = document.getElementById('messagediv');
messageDiv.innerHTML = errmsg;
if (errmsg == '')
{
calculateRate();
return true;
} else {
return false;
}
}
</script>
</head>
<body>
<body>
<a href="assignment_8.php"><img src="images/KingLogo.jpg"></a><br>
<div id="mortgagecalculatorresults">
<h2>Mortgage Calculation</h2>
<div id="calculator">
<form id="mortgage" method="post">
<table>
<tr>
<td>Amount Financed:</td>
<td><input type="text" name="amount" id="amount" ></td>
</tr>
<tr>
<td>Interest Rate:</td>
<td><input type="text" name="interest" id="interest" ></td>
</tr>
<tr>
<td>Calculated Monthly Payment:</td>
<td><input type="text" disabled="disabled" name="payment" id="payment" ></td>
</tr>
</table>
<p><input type="submit" value="Calculate Payment" onclick="return validateForm()" onsubmit="return false;">
<input type="reset" />
</p>
</form>
</div>
<div style="color: red;" id="messagediv">
</div>
</body>
</html>
看起来不错,但不能使用jquery。 :( – Brad
有几种方法可以在jQuery系统中读取 – James