M
Mariano
I've copied this frame of code from book Ajax for dummies, but i'm not
able to make it working. The source is copied, and i'm not so good
with debugging of js since i've started few days ago with it.
This is the guests.html file:
_______________________________________________________________________
<html>
<head>
<title>Using Ajax and XML</title>
<script language = "javascript">
function getGuest() {
var mozillaFlag = false;
var XMLHttpRequestObject = false;
if (window.XMLHttpRequest) {
XMLHttpRequestObject = new XMLHttpRequest();
XMLHttpRequestObject.overrideMimeType("text/xml");
mozillaFlag = true;
} else if (window.ActiveXObject) {
XMLHttpRequestObject = new
ActiveXObject("Microsoft.XMLHTTP");
}
if (XMLHttpRequestObject) {
XMLHttpRequestObject.open("GET", "guests.xml", true);
XMLHttpRequestObject.onreadystatechange = function() {
if (XMLHttpRequestObject.readyState == 4 &&
XMLHttpRequestObject.status == 200) {
var xmlDocument = XMLHttpRequestObject.responseXML;
if(mozillaFlag) {
removeWhitespace(xmlDocument);
}
displayGuest(xmlDocument);
}
}
XMLHttpRequestObject.send(null);
}
}
function displayGuest (xmldoc) {
firstnamenodes = xmldoc.getElementsByTagName("first_name");
lastnamenodes = xmldoc.getElementsByTagName("last_name");
var displayText = "The main guest was: " +
firstnamenodes[2].firstChild.nodeValue + ' '
+ lastnamenodes[2].firstChild.nodeValue;
var target = document.getElementById("targetDiv");
target.innerHTML=displayText;
}
function removeWhitespace(xml) {
var loopIndex;
for (loopIndex = 0; loopIndex < xml.childNodes.length; loopIndex++)
{
var currentNode = xml.childNodes[loopIndex];
if (currentNode.nodeType == 1) {
removeWhitespace(currentNode);
}
if (((/^\s+$/.test(currentNode.nodeValue))) &&
(currentNode.nodeType == 3)) {
xml.removeChild(xml.childNodes[loopIndex--]);
}
}
}
</script>
</head>
<body>
<h1>Using Ajax and XML</h1>
<form>
<input type=submit onclick=getGuest()>
</form>
<div id="targetDiv" width =100 height=100>
Who was the main guest?
</div>
</body>
</html>
_______________________________________________________________________
And this is the guests.xml file:
_______________________________________________________________________
<?xml version="1.0"?>
<events>
<event type="informal">
<event_title>15th award ceremony</event_title>
<event_number>1207</event_number>
<subject>gala event</subject>
<date>7/4/2006</date>
<people>
<person attendance="present">
<first_name>Sam</first_name>
<last_name>Edwards</last_name>
</person>
<person attendance="absent">
<first_name>Sally</first_name>
<last_name>Jackson</last_name>
</person>
<person attendance="present">
<first_name>Cary</first_name>
<last_name>Grant</last_name>
</person>
</people>
</event>
</events>
_______________________________________________________________________
Thus, when the button is clicked nothing happen as you can see in this
page:
http://mariano.altervista.org/ajax/cartella/guests.html
Indeed what should be happen at button click is the replacing of the
string:
Who was the main guest?
with the string:
The main guest was Gary Chant.
Every help solution will be appreciate.
able to make it working. The source is copied, and i'm not so good
with debugging of js since i've started few days ago with it.
This is the guests.html file:
_______________________________________________________________________
<html>
<head>
<title>Using Ajax and XML</title>
<script language = "javascript">
function getGuest() {
var mozillaFlag = false;
var XMLHttpRequestObject = false;
if (window.XMLHttpRequest) {
XMLHttpRequestObject = new XMLHttpRequest();
XMLHttpRequestObject.overrideMimeType("text/xml");
mozillaFlag = true;
} else if (window.ActiveXObject) {
XMLHttpRequestObject = new
ActiveXObject("Microsoft.XMLHTTP");
}
if (XMLHttpRequestObject) {
XMLHttpRequestObject.open("GET", "guests.xml", true);
XMLHttpRequestObject.onreadystatechange = function() {
if (XMLHttpRequestObject.readyState == 4 &&
XMLHttpRequestObject.status == 200) {
var xmlDocument = XMLHttpRequestObject.responseXML;
if(mozillaFlag) {
removeWhitespace(xmlDocument);
}
displayGuest(xmlDocument);
}
}
XMLHttpRequestObject.send(null);
}
}
function displayGuest (xmldoc) {
firstnamenodes = xmldoc.getElementsByTagName("first_name");
lastnamenodes = xmldoc.getElementsByTagName("last_name");
var displayText = "The main guest was: " +
firstnamenodes[2].firstChild.nodeValue + ' '
+ lastnamenodes[2].firstChild.nodeValue;
var target = document.getElementById("targetDiv");
target.innerHTML=displayText;
}
function removeWhitespace(xml) {
var loopIndex;
for (loopIndex = 0; loopIndex < xml.childNodes.length; loopIndex++)
{
var currentNode = xml.childNodes[loopIndex];
if (currentNode.nodeType == 1) {
removeWhitespace(currentNode);
}
if (((/^\s+$/.test(currentNode.nodeValue))) &&
(currentNode.nodeType == 3)) {
xml.removeChild(xml.childNodes[loopIndex--]);
}
}
}
</script>
</head>
<body>
<h1>Using Ajax and XML</h1>
<form>
<input type=submit onclick=getGuest()>
</form>
<div id="targetDiv" width =100 height=100>
Who was the main guest?
</div>
</body>
</html>
_______________________________________________________________________
And this is the guests.xml file:
_______________________________________________________________________
<?xml version="1.0"?>
<events>
<event type="informal">
<event_title>15th award ceremony</event_title>
<event_number>1207</event_number>
<subject>gala event</subject>
<date>7/4/2006</date>
<people>
<person attendance="present">
<first_name>Sam</first_name>
<last_name>Edwards</last_name>
</person>
<person attendance="absent">
<first_name>Sally</first_name>
<last_name>Jackson</last_name>
</person>
<person attendance="present">
<first_name>Cary</first_name>
<last_name>Grant</last_name>
</person>
</people>
</event>
</events>
_______________________________________________________________________
Thus, when the button is clicked nothing happen as you can see in this
page:
http://mariano.altervista.org/ajax/cartella/guests.html
Indeed what should be happen at button click is the replacing of the
string:
Who was the main guest?
with the string:
The main guest was Gary Chant.
Every help solution will be appreciate.
