Javascript POST request for Update, no HTML text update

Question

I have been writting a CMS, and im currently working on a remote Updater script, so users can update the CMS with a click of a button. Problem is, i cant see to get this JS snippet below to work:

    <script type="text/javascript">
    $(document).ready(function() {
        $('#update').html('Checking for updates...');
        check();
      });

    //function to check for new updates
    function check(){

        //use ajax to run the check
        $.post("http://updateserver.come/get_update.php", { version: cms_version },
            function(result){
                //if the result is 1
                if(result == 1){
                    //show that there are updates
                    $('#update').html('Updates is Available');
                }else{
                    //show that there are NO updates
                    $('#update').html('Updates are not Available');
                }
        });

    }
    </script>

<div id="update"></div>

The problem is, when JS gets the response, it doesnt update the text between the divs. Anyone have a clue why this is?

Answer 1

Web applications are limited by the so-called Same Origin Policy , which restricts requests to the same domain. If your app doesn't live in the same domain as the web service you're trying to POST to, the browser won't let it happen.