libAjaxUtil.js
Codice PHP:
/*
* Istanzia l'oggetto XMLHttpRequest
*/
function makeXMLHttpRequest()
{
var request = undefined;
if (window.XMLHttpRequest)
{
request = new XMLHttpRequest();
if(request.overrideMimeType)
{
request.overrideMimeType("text/xml");
}
}else{
if(window.ActiveXObject)
{
try
{
request = new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
try
{
request = new ActiveXObject("Microsoft.XMLHTTP");
}catch(e){}
}
}
}
return request;
}
index.html
Codice PHP:
<html>
<head>
<script type="text/javascript" src="libAjaxUtil.js"></script>
</head>
<body>
<input type="text" id="input" />
<div id="content"></div>
<button onclick="javascript:change(document.getElementById('input').value)">change</button>
<script type="text/javascript">
/*
* Callback delle richieste AJAX
*/
function ajaxCallback()
{
}
function change(n){
var xmlHttpRequest = makeXMLHttpRequest();
if(!xmlHttpRequest)
{
alert('Non è possibile usare AJAX');
}else{
xmlHttpRequest.onreadystatechange = function(){try
{
if(xmlHttpRequest.readyState == 4)
{
if(xmlHttpRequest.status == 200)
{
var text = xmlHttpRequest.responseText;
var doc = xmlHttpRequest.responseXML;
document.getElementById('content').innerHTML = text;
}else{
if(xmlHttpRequest.status == 404){alert('404: Not Found');}
else if(xmlHttpRequest.status == 500){alert('500: Internal Server Error');}
else{alert(xmlHttpRequest.status + ': '+ xmlHttpRequest.statusText);}
}
}else{}
}catch(e){
alert('Errore in callback function: '+ e);
}};//ajaxCallback;
xmlHttpRequest.open('GET','content.php?n='+n,true);
xmlHttpRequest.send(null);
}}
</script>
</body>
</html>
content.php
Codice PHP:
<?php
$n = $_GET['n'];
for($i=0; $i<$n; $i++)
{
echo "ciao
";
}
?>
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