slide.js

$('.single-content').hide();

$(document).ready(function() {

    var slide_time = 500;

    $(".blocks-container .block").click(function() {
        console.log($(this).index());
        var slide_status = $(this).parent().children().last().attr("slide-status");
        if(slide_status == "closed") {
            $(this).parent().children().last().find($("p.omschrijving")).html($(this).children().last().text());
            $(this).parent().children().last().find($("img.single-image")).attr("src", $(this).children().first().children().first().attr("src"));
            $(this).parent().children().last().slideDown(slide_time,"linear");
            $(this).parent().animate({'height':'1016px'}, slide_time);

            $(this).parent().children().last().attr("slide-status", "open");
            $(this).parent().children().last().attr("slide-nr", $(this).index());
        } else {
            if($(this).parent().children().last().attr("slide-nr") == $(this).index()) {
                $(this).parent().children().last().slideUp(slide_time,"linear");
                $(this).parent().animate({'height':'450px'}, slide_time);

                $(this).parent().children().last().attr("slide-status", "closed");
                $(this).parent().children().last().attr("slide-nr", $(this).index());
            } else {
                $(this).parent().children().last().slideUp(slide_time,"linear");
                $(this).parent().animate({'height':'450px'}, slide_time);
                $this = $(this);
                setTimeout(function() {
                    $this.parent().children().last().find($("p.omschrijving")).html($this.children().last().text());
                    $this.parent().children().last().find($("img.single-image")).attr("src", $this.children().first().children().first().attr("src"));
                    $this.parent().children().last().slideDown(slide_time,"linear");
                    $this.parent().animate({'height':'1016px'}, slide_time);

                    $this.parent().children().last().attr("slide-status", "open");
                    $this.parent().children().last().attr("slide-nr", $this.index());
                }, slide_time);
            }
        }

    });

});