$(document).ready(function(){

    $.jtabber({
    mainLinkTag: "#nav a", // much like a css selector, you must have a 'title' attribute that links to the div id name
    activeLinkClass: "selected", // class that is applied to the tab once it's clicked
    hiddenContentClass: "hiddencontent", // the class of the content you are hiding until the tab is clicked
    showDefaultTab: 1, // 1 will open the first tab, 2 will open the second etc.  null will open nothing by default
    showErrors: true, // true/false - if you want errors to be alerted to you
    effect: 'slide', // null, 'slide' or 'fade' - do you want your content to fade in or slide in?
    effectSpeed: 'slow' // 'slow', 'medium' or 'fast' - the speed of the effect
    });

});