我目前正在开发一个使用 jquery ajax 函数的项目。我只是希望 ajax 函数在单击某个按钮时显示服务器上文件中的一些文本，但当我单击该按钮时它什么也不做。我尝试添加错误消息，但这似乎也不起作用。我已经确保使用支持 ajax 功能的 jquery 版本，我什至从我知道有效的来源复制并粘贴了代码，但似乎没有任何效果。
我的java脚本文件
window.onload=loadDoc();
$(document).ready(function(){ // the function that should be getting called
$("#accountInfo").click(function(){
$.ajax({url: "accountPerks.txt",
error: function(xhr, status, error) {
var err = eval("(" + xhr.responseText + ")");
alert(err.Message);
},
success: function(result){
$("#perksDiv").text(result);
}});
});
});
//everything below here are functions for separate pages
$(document).ready(function(){
$("#member1Info").click(function(){
$("#BandMember1").css("visibility", "visible");
});
});
$(document).ready(function(){
$("#member2Info").click(function(){
$("#BandMember2").css("visibility", "visible");
});
});
$(document).ready(function(){
$("#member3Info").click(function(){
$("#BandMember3").css("visibility", "visible");
});
});
function newAlbum(){
var node = document.createElement("li");
var textNode = document.createTextNode("aaaaallllpxas(2023)");
node.appendChild(textNode);
document.getElementById("albumList").appendChild(node);
$("#sneakPeak").css("visibility", "hidden");
}
var getAlbum = document.getElementById("sneakPeak");
getAlbum.onclick=function(){
newAlbum();
}
function loadDoc() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function(){
if(xhttp.readyState == 4 && xhttp.status == 200){
document.getElementById("ExtraText").innerHTML = xhttp.responseText;
}
};
xhttp.open("GET", "TourInfo.txt", true);
xhttp.send();
}
我希望文本文件出现在的页面
<?php
session_start();
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>CMP204 Unit Two Coursework Template</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<link rel="stylesheet" href="css/style.css">
</head>
<body>
<h1>User Profile</h1>
<nav>
<?php include_once "includes/links.php" ?>
</nav>
<?php
echo "Welcome " . $_SESSION["accountName"] . ".<br>";
?>
<button id="accountInfo" type="button" class="btn btn-info btn-md">Click here to learn about account privileges</button> // this button should display the text from the server
<p id="perksDiv"> <p> // the text from the server should be showing in this paragraph
<div class="container-fluid">
<div class="row">
<div class="col-sm-4">
<form action="addGigsAttended.php" method="post">
add gig attended
<input type="text" name="GigToAdd">
<input type="submit">
</form>
</div>
<div class="col-sm-4">
<form action="editGigsAttended.php" method="post">
edit gig you want to change
<input type="text" name="GigToEdit">
<br>
select gig to replace it with
<input type="text" name="GigToReplace">
<input type="submit">
</form>
</div>
<div class="col-sm-4">
<form action="deleteGigsAttended.php" method="post">
delete gig attended
<input type="text" name="GigToDelete">
<input type="submit">
</form>
</div>
</div>
</div>
<p>Here are all the gigs you have attended</p>
</br>
<?php
$servername = "lochnagar.abertay.ac.uk";
$username = "sql2100904";
$password = "ftAYZgzXz6au";
$dbname = "sql2100904";
$conn = mysqli_connect($servername, $username, $password, $dbname);
$accountName = $_SESSION["accountName"];
$getGigs = mysqli_prepare($conn, "SELECT gigName FROM $accountName");
$results = mysqli_stmt_execute($getGigs);
mysqli_stmt_bind_result($getGigs, $GigLocation);
while (mysqli_stmt_fetch($getGigs)) {
echo $GigLocation . " ";
}
mysqli_stmt_close($getGigs);
myslqi_close($conn);
?>
<!--these scripts are necessary for Bootstrap and must be before the close body tag-->
<script src="https://code.jquery.com/jquery-3.4.1.min.js" integrity="sha256-CSXorXvZcTkaix6Yvo6HppcZGetbYMGWSFlBw8HfCJo=" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@4.4.1/dist/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
<script src="javascript/script2.js"></script>
</body>
</html> 
仅使用 1 个文档函数，如果您使用太多 $(document) 函数，则响应中只会返回最后一个函数。
$(document).ready(function(){ //use one doc ready and do your code in this })并使用您想要运行的其他函数将在 window.load 函数中加载