我正在设计费用系统，用户可以在其中定义费用组件和他们的费用。我已设法为用户创建设施，以根据需要定义费用组件和费用金额。但是当我试图添加它们时，即使我试图通过为它们分配类来添加它们，这似乎也没有用。以下是html代码：
<html>
<head>
<meta content="text/html; charset=ISO-8859-1" http-equiv="content-type">
<link rel="stylesheet" href="masterfees.css" />
<title>feemaster</title>
<script type="text/javascript" src="ffees.js"></script>
<script type="text/javascript">
function totalfixfees(){
var tffees = 0;
var cusid_ele = document.getElementsByClassName('ffeetotal');
for (var i = 0; i < cusid_ele.length; ++i) {
if (!isNaN(parseFloat(cusid_ele[i].value)) )
tffees += parseFloat(cusid_ele[i].value);
}
document.getElementById('tffees').value=tffees;
}
</script>
<script></script>
<style>
</style>
</head>
<body>
<!-- Trigger/Open The Modal for adding fees -->
<button id="myBtn">Add New Fees</button>
<!-- The Modal -->
<div id="myModal" class="modal">
<!-- Modal content -->
<div class="modal-content">
<div class="modal-header">
<span class="close"><button>✖</button></span>
<h2>Create Fees</h2>
</div>
<div class="modal-body">
<fieldset>
<legend>Fixed Fees Component</legend>
<div id="wrapper">
<table align='center' cellspacing=2 cellpadding=5 id="data_table" border=1>
<tr>
<th>Name</th>
<th>Amount (in Rs)</th>
</tr>
<tr id="row1">
<td id="ffname_row1">Annual Fees</td>
<td id="ffamount_row1" class="ffeetotal">1000</td>
<td>
<input type="button" id="edit_button1" value="Edit" class="edit" onclick="edit_row('1')">
<input type="button" id="save_button1" value="Save" class="save" onclick="save_row('1')">
<input type="button" value="Delete" class="delete" onclick="delete_row('1')">
</td>
</tr>
<tr id="row2">
<td id="ffname_row2">Medical Fees</td>
<td id="ffamount_row2" class="ffeetotal">2000</td>
<td>
<input type="button" id="edit_button2" value="Edit" class="edit" onclick="edit_row('2')">
<input type="button" id="save_button2" value="Save" class="save" onclick="save_row('2')">
<input type="button" value="Delete" class="delete" onclick="delete_row('2')">
</td>
</tr>
<tr id="row3">
<td id="ffname_row3">Tution Fees</td>
<td id="ffamount_row3" class="ffeetotal">3000</td>
<td>
<input type="button" id="edit_button3" value="Edit" class="edit" onclick="edit_row('3')">
<input type="button" id="save_button3" value="Save" class="save" onclick="save_row('3')">
<input type="button" value="Delete" class="delete" onclick="delete_row('3')">
</td>
</tr>
<tr>
<td><input type="text" id="new_ffname"></td>
<td><input type="number" id="new_ffamount" class="ffeetotal"></td>
<td><input type="button" class="add" onclick="add_row();" value="Add Row"></td>
</tr>
</table>
</div>
<br>
<label> Fixed Fee Total </label>
<input name="tffees" type="text" id="tffees" class="n1fees" value="" readonly>
<button onclick="totalfixfees()">Calculate Total Fees</button>
</div>
<div class="modal-footer">
<h3></h3>
</div>
</div>
</div>
<script>
// Get the modal
var modal = document.getElementById('myModal');
// Get the button that opens the modal
var btn = document.getElementById("myBtn");
// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];
// When the user clicks the button, open the modal
btn.onclick = function() {
modal.style.display = "block";
}
// When the user clicks on <span> (x), close the modal
span.onclick = function() {
modal.style.display = "none";
}
// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
if (event.target == modal) {
modal.style.display = "none";
}
}
</script>
</body>
</html>
javascript是
function edit_row(no)
{
document.getElementById("edit_button"+no).style.display="none";
document.getElementById("save_button"+no).style.display="block";
var ffname=document.getElementById("ffname_row"+no);
var ffamount=document.getElementById("ffamount_row"+no);
var ffname_data=ffname.innerHTML;
var ffamount_data=ffamount.innerHTML;
ffname.innerHTML="<input type='text' id='ffname_text"+no+"' value='"+ffname_data+"'>";
ffamount.innerHTML="<input type='number' class='ffeetotal' id='ffamount_text"+no+"' value='"+ffamount_data+"'>";
}
function save_row(no)
{
var ffname_val=document.getElementById("ffname_text"+no).value;
var ffamount_val=document.getElementById("ffamount_text"+no).value;
document.getElementById("ffname_row"+no).innerHTML=ffname_val;
document.getElementById("ffamount_row"+no).innerHTML=ffamount_val;
document.getElementById("edit_button"+no).style.display="block";
document.getElementById("save_button"+no).style.display="none";
}
function delete_row(no)
{
document.getElementById("row"+no+"").outerHTML="";
}
function add_row()
{
var new_ffname=document.getElementById("new_ffname").value;
var new_ffamount=document.getElementById("new_ffamount").value;
var table=document.getElementById("data_table");
var table_len=(table.rows.length)-1;
var row = table.insertRow(table_len).outerHTML="<tr id='row"+table_len+"'><td id='ffname_row"+table_len+"'>"+new_ffname+"</td><td id='ffamount_row"+table_len+"'>"+new_ffamount+"</td><td><input type='button' id='edit_button"+table_len+"' value='Edit' class='edit' onclick='edit_row("+table_len+")'> <input type='button' id='save_button"+table_len+"' value='Save' class='save' onclick='save_row("+table_len+")'> <input type='button' value='Delete' class='delete' onclick='delete_row("+table_len+")'></td></tr>";
document.getElementById("new_ffname").value="";
document.getElementById("new_ffamount").value="";
}
我不确定我哪里出错了。你能帮我吗？
由于
答案 0 :(得分：1)
您正在阅读value属性以检索费用，但这些元素不是input元素，而是td元素，它们不具有value } property。
而是使用textContent：
function totalfixfees(){
var tffees = 0;
var cusid_ele = document.getElementsByClassName('ffeetotal');
for (var i = 0; i < cusid_ele.length; ++i) {
if (!isNaN(parseFloat(cusid_ele[i].textContent)) )
tffees += parseFloat(cusid_ele[i].textContent);
}
document.getElementById('tffees').value=tffees;
}
确保在插入新行时还将类 ffeetotal 添加到相关的td元素中。因此，相应地更改以下任务：
var row = table.insertRow(table_len).outerHTML="...
..所以它有本部分提到的类：
"... <td id='ffamount_row"+table_len+"' class='ffeetotal'> ..."
答案 1 :(得分：1)