function init_tabs(tabName) {
    if (document.getElementById('tab-nav')) {
        var tab_container = document.getElementById('tab-nav');
        var tabs = tab_container.getElementsByTagName('a');
        //document.body.className = "tab-1";
        document.body.className = tabName;
        for (var i=0; i < tabs.length; i++) {
            tabs[i].onclick = function() {
                document.body.className = this.parentNode.className;
                if (document.body.className.indexOf('tab-2') >= 0) {
                    //safetyPopup.init();
                }

                return false;
            }
        };
    }
}