need help with some tabs ... i`m a newbie

i have 3 tabs and i want to make active (when page loads) second tab. And i wonder if is possible to make tabs rotate (i read about this command .tabs( "rotate" , ms , [continuing] ) but i dont know where to put it)

i use this code for my ajax tabs

$(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;
	});

});

Code (markup):

and this for html

<ul class="tabs">
    <li><a href="#tab1">Pages</a></li>
    <li><a href="#tab2">Categories</a></li>
	<li><a href="#tab3">Follow us</a></li>
</ul>

<div class="tab_container">
    <div id="tab1" class="tab_content">
        x<!--Content-->
    </div>
	
	
    <div id="tab2" class="tab_content">
       y<!--Content-->
    </div>
	
	    <div id="tab3" class="tab_content">
       z<!--Content-->
    </div>
	
	
	
</div>

Code (markup):