Ajax load doubles content

Question

I have a site built using wordpress as the cms and the index has a long accordian style list of post titles and once you click on this heading the content for that post is loaded via ajax into the index page.

I have the problem that when the heading is clicked again, it loads the post content again and if you click a different heading it won't close and remove the previous one that has been clicked.

I am new to working with ajax and unsure how to go about fixing this. Is there a way to make the content be removed once the heading is clicked a second time to close the accordion or another heading is clicked to expand and open. Live site is here: http://www.minervasydney.com/

Below is the code for my ajax and the part in my index file that lists the headings. If anyone has ideas it would be greatly appreciated. Thank you!

AJAX

        $("a.exhibitionInformation").on("click", function(event) {

        var exhibitionContainer = $(this).parent(".exhibition");
        var url = $(this).attr("href");
        var doc = $(this).next(".exhibitionDocuments");
        var title = convertToSlug($(this).text().split("\n")[1]);
        var slug = $(this).attr("data-slug");
        $(this).toggleClass("selected");

        if($(doc).is(':not(:hidden)')) {
            $(doc).slideToggle();
        } else {            


            $.ajax({
                url: url,
                type: "GET",
                success: function(data) {
                    var content = $(data).find(".single-document");                 
                    $(doc).append(content).slideToggle(300);                    
                    $("html, body").animate({ scrollTop: exhibitionContainer.offset().top - 26 });
                    window.location.hash = slug;
                }           
            });

        }

        event.preventDefault();
    });


    //ajaxstarStop Loading
    $( document ).ajaxStart(function() {
        $( "#loading" ).fadeIn(100);
    });

    $( document ).ajaxStop(function() {
        $( "#loading" ).fadeOut();
    });     


    function convertToSlug(Text)
    {
        return Text
            .toLowerCase()
            .replace(/ /g,'-')
            .replace(/[^\w-]+/g,'')
            ;
    }

INDEX

            <section class="exhibition">

            <a class="exhibitionInformation" href="<?php the_permalink(); ?>" data-slug="<?php echo $post->post_name; ?>">
                <span class="dates"><?php echo types_render_field("dates", array("argument1"=>"value1")); ?></span>
                <span class="opening"><?php echo types_render_field("opening", array("argument1"=>"value1")); ?></span>
                <span class="title">&#8220;<?php the_title(); ?>&#8221;</span>
                <span class="artist"><?php echo types_render_field("artist", array("argument1"=>"value1")); ?></span>
                <span class="extra"><?php echo types_render_field("extra", array("argument1"=>"value1")); ?></span>
            </a>


            <article class="exhibitionDocuments">

            </article>

        </section>

Answer 1

Within your ajax request:

$.ajax({
    url: url,
    type: "GET",
    success: function(data) {
        var content = $(data).find(".single-document");                 
        $(doc).append(content).slideToggle(300);                    
        $("html, body").animate({ scrollTop: exhibitionContainer.offset().top - 26 });
        window.location.hash = slug;
    }           
});

On the second line under success , change .append to .html .

The line should now be:

$(doc).html(content).slideToggle(300);

It will load the content AND remove previous if there was.

---

EDIT

To close a previously opened .exhibitionDocuments :

 $(document).find(".exhibitionDocuments").hide(); 

Place it on top of your success callback.
(right before var content = $(data).find(".single-document"); )