$(document).ready(function(){
    	$("#ak").hide();
    	$("#ak2").hide();
    	$("#ak3").hide();		
    $("a.open-close").click(function () {
      $("#ak").slideToggle();
    });
    $("a.open-close2").click(function () {
      $("#ak2").slideToggle();
    });	
    $("a.open-close3").click(function () {
      $("#ak3").slideToggle();
    });		
});

<div class="nav_right2">

<a class="open-close" href="#">Letzte Kommentare</a>
<div id="ak">
<p>Inhalt kommt hier rein...</p>
</div>

<a class="open-close2" href="#">Neueste Artikel</a>
<div id="ak2">
<p>Inhalt kommt hier rein...</p>
</div>
<a class="open-close3" href="#">Zuf&auml;lliger Artikel</a>
<div id="ak3">
<p>Inhalt kommt hier rein...</p>
</div>
</div>

// Smooth Scroll to Top
$(document).ready(function() {
    $('a[href*=#]').click(function() {
    if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'')
        && location.hostname == this.hostname) {
            var $target = $(this.hash);
            $target = $target.length && $target || $('[name=' + this.hash.slice(1) +']');
            if ($target.length) {
                var targetOffset = $target.offset().top;
                $('html,body').animate({scrollTop: targetOffset}, 700);
                return false;
            }
        }
    });
});

$(document).ready(function() {

	//When page loads...
	$(".tab_content").hide(); //Hide all content
	$("ul.tabs li:first").addClass("active").show(); //Activate first tab
	$(".tab_content:first").show(); //Show first tab content

	//On Click Event
	$("ul.tabs li").click(function() {

		$("ul.tabs li").removeClass("active"); //Remove any "active" class
		$(this).addClass("active"); //Add "active" class to selected tab
		$(".tab_content").hide(); //Hide all tab content

		var activeTab = $(this).find("a").attr("href"); //Find the href attribute value to identify the active tab + content
		$(activeTab).fadeIn(); //Fade in the active ID content
		return false;
	});

});

<ul class="tabs">
    <li><a href="#tab1">Gallery</a></li>
    <li><a href="#tab2">Submit</a></li>
</ul>

<div class="tab_container">
    <div id="tab1" class="tab_content">
        test1<!--Content-->
    </div>
    <div id="tab2" class="tab_content">
       test2<!--Content-->
    </div>
</div>

$('a[href*=#]').click(function() {

$('a.klasse[href*=#]').click(function() {