跨域Ajax呼叫Jquery

Question

I am trying to call a page with ajax, but from another server. This js code runs from bookmark in any page you want and I need to get some data from my server. How could I do this? or maybe connect directly to the database?

I got this code:

$j.getJSON(serverUrl+"isLogin.php?callback=?",function(data){
 //really no need to do anything here, we're just posting data
 //but this will output success
 alert(data);
});

isLogin:

if ($_SESSION['user'] == ''){
     echo json_encode(array("isLogin" => "false"));

} else {
    echo json_encode(array("isLogin" => "true"));
}

How could I make this? I try allot of solutions but none works. This one said no errors, but the alert never appear

Thanks

Answer 1

AJAX (The XMLHttpRequest object) is limited to the same domain for security reasons.

You have a couple ways to go about this:

You can use JSONP if your API supports it. This is very similar to your current AJAX approach. This is jQuery's documentation - http://api.jquery.com/jQuery.getJSON/

Another option is to create a local proxy. This is a little more in depth, but gives you full control. Here's a good article - http://developer.yahoo.com/javascript/howto-proxy.html