Accordeon with the first item opened

HTML

<div id="accordeon">
     <h1 class="trigger trigger_active">click here to show next div</h1>

    <div class="toggle_container" style="display:block">
        <img src="http://www.beeldenstorm.org/2014/style/img/icons/mob_werkplaatsenondersteuning.svg">
        <br/>text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show</div>
     <h1 class="trigger">click here to show next div</h1>

    <div class="toggle_container">
        <img src="http://www.beeldenstorm.org/2014/style/img/icons/mob_werkplaatsenondersteuning.svg">
        <br/>text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show</div>
     <h1 class="trigger">click here to show next div</h1>

    <div class="toggle_container">
        <img src="http://www.beeldenstorm.org/2014/style/img/icons/mob_werkplaatsenondersteuning.svg">
        <br/>text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to show text to...

CSS

h1 {
    font-weight: bold;
    cursor:pointer;
    font-size: 1.5em
}
.toggle_container {
    display: none;
}

JavaScript

$(function () {
    $('.trigger').click(function (e) {
        $('.trigger.trigger_active').toggleClass('trigger_active')
            .next('.toggle_container')
            .slideToggle('fast');
        $(this).toggleClass('trigger_active')
            .next('.toggle_container')
            .slideToggle('fast');
        e.preventDefault();
    });
});