var interval = "";
var myPic = new Image(925,300);
myPic.src = "/images/pb_p-operations.jpg";
myPic = new Image(925,300);
myPic.src = "/images/pb_q-guide.jpg";

$(document).ready(function(){
    $('#q-guide').addClass('active');
    $('#p-operations').addClass('last-active');
    if (interval == "") {
        interval = setInterval("slideSwitch()", 9000 );
    }
});

function Next() {
    stop_Int();
    var $active = $('#box_promo div.active');
    var $next = $('#box_promo div.last-active');
    $active.removeClass('active').addClass('last-active');
    $next.removeClass('last-active').addClass('active');
    interval = setInterval("slideSwitch()", 9000 );
}

function stop_Int() {
    if(interval!="") {
      window.clearInterval(interval);
      interval="";
    }
}

function slideSwitch() {
    var $active = $('#box_promo div.active');

    if ( $active.length == 0 ) $active = $('#q-guide');

    var $next =  $active.next().length ? $active.next()
        : $('#box_promo div:first');

    $active.removeClass('active').addClass('last-active');
    $next.removeClass('last-active').addClass('active');
}