Ajax show div if variable is set

So I'm using jQ开发者_如何学Pythonuery to POST some items and save into the database. I have two optional fields, if they're not empty, I'd like to fadeIn in a related div in the success function. You'll notice the #picCheck.fadeIn. Right now that fades in if the stuff is submitted, but like I said, I'd like for it fadeIn only if the variable picvault from the submitted form has is set.

Here's the jQuery:

$.ajax({
    type: "POST",
    url: "edit.php",
    data: $form.serialize(),
    success: function(){
        $('form#editForm').hide();
        $('div.success').center();
        $('div.success').fadeIn('slow').animate({opacity: 1.0}, 2000).fadeOut(1000);
        $('#picCheck'+sid).fadeIn('slow');
    }
}); // End .ajax function

Simply check the value of picvault in your callback function (assuming it's a checkbox)

if($("#picvault").is(":checked")) {
    $('#picCheck'+sid).fadeIn('slow');
}

If you have access to the form, just put an if statement around your fadeIn code checking that value.