JavaScript DHTML/Ajax Layer/XMLHttpRequest
Ajax and php
<source lang="html4strict">
<html> <head> <title></title> </head> <body>
<script type="text/javascript"> function readyAJAX() { try {
return new XMLHttpRequest();
} catch(e) {
try {
return new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
return new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
return "A newer browser is needed.";
}
}
} } var requestObj = readyAJAX(); var url ="http://127.0.0.1/sum.php?num1=2&num2=2"; requestObj.open("GET",url,true); requestObj.send(); requestObj.onreadystatechange = function() {
if (requestObj.readyState == 4) {
if (requestObj.status == 200) {
document.write(requestObj.responseText);
} else {
document.write(requestObj.statusText);
}
}
} </script> </body> </html>
//sum.php <?php print $_GET["num1"] + $_GET["num2"]; ?>
</source>
Is your Browser Ajax ready
<source lang="html4strict">
<html> <head> <title>ISBN</title> </head> <body>
<script type="text/javascript"> function readyAJAX() {
try {
return new XMLHttpRequest();
} catch(e) {
try {
return new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
return new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
return "A newer browser is needed.";
}
}
}
} var requestObj = readyAJAX(); var url = "http://www.yourserver.org/isbn.php?isbn=11234567890";
requestObj.open("GET",url,true);
requestObj.send();
requestObj.onreadystatechange = function() {
if (requestObj.readyState == 4) {
if (requestObj.status == 200) {
document.write(requestObj.responseText);
} else {
document.write(requestObj.statusText);
}
}
} </script> </body> </html>
</source>
Use XMLHttpRequest to send and read data
<source lang="html4strict">
<html> <head> <title>ISBN</title> </head> <body>
<script type="text/javascript"> function readyAJAX() {
try {
return new XMLHttpRequest();
} catch(e) {
try {
return new ActiveXObject("Msxml2.XMLHTTP");
} catch(e) {
try {
return new ActiveXObject("Microsoft.XMLHTTP");
} catch(e) {
return "A newer browser is needed.";
}
}
}
} var requestObj = readyAJAX(); var url = "http://www.yourserver.org/isbn.php?isbn=11234567890"; requestObj.open("GET",url,true); requestObj.send(); requestObj.onreadystatechange = function() {
if (requestObj.readyState == 4) {
if (requestObj.status == 200) {
document.write(requestObj.responseText);
} else {
document.write(requestObj.statusText);
}
}
} </script> </body> </html>
</source>
