花費了幾個小時來查找出了什麼問題,但失敗了..因爲我是新手,因此我不知道我在看什麼。真的需要你們找到錯誤。無法讀取未定義的屬性'readyState'
HTML
<!doctype html>
<head>
<script type="text/javascript" src="foodstore.js"></script>
</head>
<body onload="process()">
<h3>The Chuff Bucket</h3>
Enter the food you would like to order:
<input type="text" id="userInput">
<div id="underInput" />
</body>
</html>
的javascript:
var xmlHttp = createXmlHttpRequestObject();
function createXmlHttpRequestObject(){
var xmlHttp;
if(window.ActiveXobject){
try{
xmlHttp = new ActiveXobject("Microsoft.XMLHTTP");
}catch(e){
xmlHttp = false;
}
}else{
try{
xmlHttp = new XmlHttpRequest();
}catch(e){
xmlHttp = false;
}
}
if(!xmlHttp){
alert("can't create that object");
}
else{
return xmlHttp;
}
}
function process(){
if(xmlHttp.readyState==0 || xmlHttp.readyState==4){
food = encodeURIComponent(document.getElementById("userInput").value);
xmlHttp.open("GET", "foodstore.php?food=" + food, true);
xmlHttp.onreadystatechange = handleServerResponse;
xmlHttp.send(null);
}else{
setTimeout('process()', 1000);
}
}
function handleServerResponse(){
if(xmlHttp.readyState==4){
if(xmlHttp.status==200){
xmlResponse = xmlHttp.responseXML;
xmlDocumentElement = xmlResponse.documentElement;
message = xmlDocumentElement.firstChild.data;
document.getElementById("underInput").innerHTML = "<span style='color:blue'>" + message + "</span>";
setTimeout('process()', 1000);
}else{
alert('something went wrong');
}
}
}
PHP(我覺得這個文件引起的問題)
<?php
header('Content-Type: text/xml');
echo '<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>';
echo '<response>';
$food = $_GET['food'];
$foodArray = array('tuna','bacon','beef','ham');
if(in_array($food,$foodArray)){
echo 'We do have ' .$food. '!';
}else if($food == ''){
echo 'Enter a food name.';
}else
{
echo "no, we don't sell " .$food. "!";
}
echo '</response>';
?>
不是一個解決辦法,但你應該永遠* *通字符串'setTimeout'。這使得它使用'eval',這是不好的!傳遞一個函數:'setTimeout(process,1000);' –
我同意Rocket Hazmat關於setTimeout的字符串參數,但除此之外,我沒有看到您的代碼出現問題。所以可能這個錯誤是在別的地方... – devnull69
你的PHP代碼實際上是什麼回聲?你確定它是有效的XML嗎? –