AJAX need help serious
hello guy's i'm new to ajax.i'm using a ebook ajax and php programming.I just strart coding and yet i'm stopped by a problem.And honestly i've tried 4 forum sites and nobody minds me.i hope i'll have your attention here and continue learning right here:I have Mozilla FireFox 1.0.7 and Internet Explorer 6,and using xampp with dreamweaver 8. here is my problem:
[CODE=javascript]HTML Code://html doc <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>Ajax Foundation using :XMLHttpRequest</title> <script type="text/javascript" src="async.js"></script> </head> <body onload="process()"> Hello Server! <br /> <div id="myDivElement" /> </body> </html>
/ JavaScript Document
var xmlHttp = createXmlHttpRequestObject();
function createXmlHttpRequestObject() {
var xmlHttp;
try
{
xmlHttp = new XMLHttpRequest();
}
catch(e)
{
var XmlHttpVersions = new Array("MSXML2.XMLHTTP.6.0",
"MSXML2.XMLHTTP.5.0",
"MSXML2.XMLHTTP.4.0",
"MSXML2.XMLHTTP.3.0",
"MSXML2.XMLHTTP",
"Microsoft.XMLHTTP");
for(var i= 0; i <XmlHttpVersions.length && !xmlHttp; i++)
{
try
{
xmlHttp = new ActiveXObject(XmlHttpVersions[i]);
}
catch(e){}
}
}
if(!xmlHttp)
alert("error creating the XMLHttpRequest object.");
else
return xmlHttp;
}
function process() {
if(xmlHttp) {
try
{
xmlHttp.open("GET", "async.txt", true);
xmlHttp.onreadystatechange = handleRequestStateChange;
xmlHttp.send(null);
}
catch(e)
{
alert("can't connect to the server: \n"+ e.toString());
}
}
}
function handleRequestStateChange() {
myDiv = document.getElementById("myDivElement");
if(xmlHttp.readyState == 1 )
{
myDiv.innerHTML += "Request Status: 1 (loading) <br/>";
}
else if(xmlHttp.readyState == 2 )
{
myDiv.innerHTML += "Request Status: 2 (loaded) <br/>";
}
else if(xmlHttp.readyState == 3 )
{
myDiv.innerHTML += "Request Status: 3 (interactive) <br/>";
}
else if(xmlHttp.readyState == 4 )
{
if(xmlHttp.status == 200 )
{
try
{
response = xmlHttp.responseText;
myDiv.innerHTML += "Request Status: 4 (completed).server said: <br/>";
myDiv.innerHTML += response;
}
catch(e)
{
alert("Error reading the response: " + e.toString());
}
}
else
{
alert("There was a problem retrieving the data: \n" + xmlHttp.statusText);
}
}
}
[/CODE]
Code://async.txt, my text file Hello Josephso that makes me think that i can't create a XMLHttpRequest or ActiveXObject object but this code is working:Code:/* the error alert "there was a problem retrieving the data: Not Found" pops up after displaying :"Hello Server! Request Status: 1 (loading) Request Status: 2 (loaded) Request Status: 3 (interactive) " on the browser*/
this one do work with the same construction so i dont know much what is wrong
Code:// JavaScript Document var xmlHttp = createXmlHttpRequestObject(); // retrieves the XMLHttpRequest object function createXmlHttpRequestObject() { // will store the reference to the XMLHttpRequest object var xmlHttp; // if running Internet Explorer if(window.ActiveXObject) { try { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) { xmlHttp = false; } } // if running Mozilla or other browsers else { try { xmlHttp = new XMLHttpRequest(); } catch (e) { xmlHttp = false; } } // return the created object or display an error message if (!xmlHttp) alert("Error creating the XMLHttpRequest object."); else return xmlHttp; } // make asynchronous HTTP request using the XMLHttpRequest object function process() { // proceed only if the xmlHttp object isn't busy if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0) { // retrieve the name typed by the user on the form name = encodeURIComponent(document.getElementById("myName").value); // execute the quickstart.php page from the server xmlHttp.open("GET", "quickstart.php?name=" + name, true); // define the method to handle server responses xmlHttp.onreadystatechange = handleServerResponse; // make the server request xmlHttp.send(null); } else // if the connection is busy, try again after one second setTimeout('process()', 1000); } // executed automatically when a message is received from the server function handleServerResponse() { // move forward only if the transaction has completed if (xmlHttp.readyState == 4) { // status of 200 indicates the transaction completed successfully if (xmlHttp.status == 200) { // extract the XML retrieved from the server xmlResponse = xmlHttp.responseXML; // obtain the document element (the root element) of the XML structure xmlDocumentElement = xmlResponse.documentElement; // get the text message, which is in the first child of // the the document element helloMessage = xmlDocumentElement.firstChild.data; // update the client display using the data received from the server document.getElementById("divMessage").innerHTML = '<i>' + helloMessage + '</i>'; // restart sequence setTimeout('process()', 1000); } // a HTTP status different than 200 signals an error else { alert("There was a problem accessing the server: " + xmlHttp.statusText); } } }PHP Code://php document
<?php
// we'll generate XML output
header('Content-Type: text/xml');
// generate XML header
echo '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>';
// create the <response> element
echo '<response>';
// retrieve the user name
$name = $_GET['name'];
// generate output depending on the user name received from client
$userNames = array('CRISTIAN', 'BOGDAN', 'FILIP', 'MIHAI', 'YODA');
if (in_array(strtoupper($name), $userNames))
echo 'Hello, master ' . htmlentities($name) . '!';
else if (trim($name) == '')
echo 'Stranger, please tell me your name!';
else
echo htmlentities($name) . ', I don\'t know you!';
// close the <response> element
echo '</response>';
?>his one is working so i'm confused.i need serious help because i can't move on what is sad i want to be ready for a project so guys please help!!HTML Code:/html page <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>AJAX with PHP: Quickstart</title> <script type="text/javascript" src="quickstart.js"></script> </head> <body onload='process()'> Server wants to know your name: <input type="text" id="myName" /> <div id="divMessage" /> </body> </html>
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