Why they write the get method of ajax like this?

[jidixuelang]

aj.get = function(targetUrl, resultHandle) {
aj.targetUrl = targetUrl;
aj.XMLHttpRequest.onreadystatechange =
aj.processHandle;
aj.resultHandle = resultHandle;
if(window.XMLHttpRequest) {
aj.XMLHttpRequest.open('GET', aj.targetUrl);
aj.XMLHttpRequest.send(null);
} else {
aj.XMLHttpRequest.open("GET", targetUrl, true);
aj.XMLHttpRequest.send();
}
}

Some one tell me this is a standard?

Why they write the "get" method like this?

if(window.XMLHttpRequest) {
aj.XMLHttpRequest.open('GET', aj.targetUrl);
aj.XMLHttpRequest.send(null);
} else {
aj.XMLHttpRequest.open("GET", targetUrl, true);
aj.XMLHttpRequest.send();
}

But not directly write

aj.XMLHttpRequest.open('GET', aj.targetUrl);
aj.XMLHttpRequest.send(null);

what is the difference???

[VK]

On Jul 15, 4:43 pm, "[e-mail]"

Why they write the "get" method like this?

if(window.XMLHttpRequest) {
aj.XMLHttpRequest.open('GET', aj.targetUrl);
aj.XMLHttpRequest.send(null);
} else {
aj.XMLHttpRequest.open("GET", targetUrl, true);
aj.XMLHttpRequest.send();
}

Who are "they"? sounds scary :-)
The code above is an ugly Cargo Cult coding sample. The bottom brunch
was originally intended for IE - it is still visible by send() instead
of send(null) statement. But obviously the text passed through a
number of people having no clue what are they saying (doing), so now
it is all mixed up and it is what it is: a pointless chunk of
statements.