Question

I’m trying to use jQuery to make a slightly more sophisticated page refresh. With a meta refresh, if a page fails to load once, it won’t load again. I am trying to make something that will repeatedly try to load–if it fails to load once, it will try again the next time so that if the last load is successful I will see a fresh version of the page, whether or not there were intervening faults.

My code at present is:

<script language="JavaScript" type="text/javascript" src="/include/jquery.js">
</script>
<script language="JavaScript">
    var delay=5*1000;
    function load(){
        setTimeout(load, delay);
        jQuery("#content").load("calendar_internal.cgi?days=40", function(){
            jQuery("#preload").hide("slow");
        });
        delay = 15*60*1000;
    }
    jQuery("#content").load("calendar_internal.cgi?days=40", load);
</script>

So far as I can tell, this is functioning as a noop. It doesn’t refresh.

How can I get this to work at least at a basic level so it refreshes but one bad refresh doesn’t mean that I have to reload if I want to see the page at all?

–EDIT–

What I have now is apparently working (after light testing):

<script language="JavaScript">
var placeholder = jQuery('<div></div>');
function load(){
    setTimeout(load, 15*60*1000);
    placeholder.load("logistic_ajax.cgi", function(){
        if (placeholder.html()) 
            jQuery('#content').html(placeholder.html());
    })
}
load();
</script>

Answer 1

var $placeHolder = $('<div />');
$placeHolder.load(yourURL,function() {
    if ($placeHolder.html()) {
        $("#content").html($placeHolder.html());
    }
});

or something like that. This way you are not doing all or nothing type of thing. If something messes up with the HTML coming back, you can check in your “if” condition. Not sure the particulars of the response so you would need to hash that out on your own or let me know more detail.

Cheers.