function slideSwitch() {
    var $active = $('#slideshow IMG.active');

    if ( $active.length == 0 ) $active = $('#slideshow IMG:last');

    var $next =  $active.next().length ? $active.next()
        : $('#slideshow IMG:first');

    $active.addClass('last-active');

    $next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 1000, function() {
            $active.removeClass('active last-active');
        });
}

$(function() {
    setInterval( "slideSwitch()", 5000 );
});

$(document).ready(function(){
    var container = "body";
  // Schriftgröße Normal
  $(".standard").click(function() { $(container).css('font-size', 12); });

  // Schriftgröße Mittel
  $(".middle").click(function() { $(container).css('font-size', 14); });

  // Schriftgröße Groß
  $(".big").click(function() { $(container).css('font-size', 16); });
  
  // Panel oeffnen
    $('.box_head').click(function(){
        idelem = $(this).attr('id');
        idelemdiv = idelem.replace('boxhead_', 'box_');
        $('#'+idelemdiv).slideToggle("slow");
    });

});