我一直在寫這段代碼動態地加載從通過AJAX檢索XML文檔照片的鏈接。我有一個全局varibale xDoc,用於存儲響應XML,並在其他函數中使用,這樣我就不必每次都加載文檔。請記住,我對JavaScript很新,所以細節會很棒。的JavaScript的getElementsByTagName()不確定,IE故障,AJAX XML文件
我得到這個錯誤在Chrome:「遺漏的類型錯誤:無法調用未定義的方法‘的getElementsByTagName’」,而類似的錯誤信息在其他瀏覽器。不過,我的代碼仍然適用於FireFox,Chrome和Safari。但是,當涉及到IE時,每個版本都無法正常工作。我不明白什麼是錯的,爲什麼這個元素是未定義的。
錯誤線被清楚地標記在下面的代碼。這是「eProject.link = eProject.photo.getElementsByTagName(」edit「)[0] .firstChild.data;」
我的XML的數據結構如下:
<project>
<stuff>
<stuff>
<photos>
<photo>
<stuff>
<edit>
</photo>
</photos>
</project>
那麼這是JavaScript:
// Initialize
function init() {
// Set the xml file
loadXMLDoc("../xml/featured.xml");
}
window.onload = init;
// Define xDoc global variable
var xDoc;
var proImages = new Array();
// Retrieve XML document as document object
function loadXMLDoc(url) {
var req = null;
try {
req = new XMLHttpRequest();
req.overrideMimeType("text/xml");
}
catch(e) {
req = null;
}
if (req) {
xDoc = null;
req.open("GET", url, true);
req.onreadystatechange = function() {
if (req.readyState == 4) {
if (req.status == 200) {
xDoc = req.responseXML;
if (xDoc && typeof xDoc.childNodes != "undefined" && xDoc.childNodes.length == 0) {
xDoc = null;
}
else {
eProject = xDoc.getElementsByTagName("project")[0];
eProject.id = eProject.getElementsByTagName("id")[0].firstChild.data;
getProject(eProject.id);
}
}
}
}
req.send(null);
}
}
function getProject(id) {
count = xDoc.childNodes.length;
i = 0;
for (i; count; i = i + 1) {
eProject = xDoc.getElementsByTagName("project")[i];
eProject.id = eProject.getElementsByTagName("id")[0].firstChild.data;
if (eProject.id == id) {
// Remove old numbers
cImages = document.getElementById("cImages");
if (cImages.firstChild) {
while (cImages.firstChild)
{
cImages.removeChild(cImages.firstChild);
}
}
// Reset Array
proImages.length = 0;
eProject.photos = eProject.getElementsByTagName("photos")[0];
eProject.phot = eProject.photos.getElementsByTagName("photo");
pCount = eProject.phot.length;
i = 0;
for (i; pCount; i = i + 1) {
/*
* THIS IS WHERE THE ERROR IS
*/
eProject.photo = eProject.phot[i];
// This is the line of code that generates the error message
eProject.link = eProject.photo.getElementsByTagName("edit")[0].firstChild.data;
proImages[i] = eProject.link;
dynamImg = document.getElementById('dynamImg');
dynamImg.src = proImages[0];
dynamImg.setAttribute('onclick', 'getNumImg(1)');
nButton = document.createElement('button');
nButtonTxt = document.createTextNode(i + 1);
nButton.appendChild(nButtonTxt);
nButton.type = "button";
nButton.value = i;
if (nButton.value == '0') {
nButton.setAttribute('id', 'nButtonSelect');
}
nButton.setAttribute('onclick', 'getNumImg(' + i + ')');
cImages.appendChild(nButton);
}
break;
}
}
}
這將使用類似的jQuery容易得多。 – Dutchie432
我添加了如何初始化XML –