function slideSwitch() {

    var jQueryactive = jQuery('#img_container_slide DIV.active');

    if ( jQueryactive.length == 0 ) jQueryactive = jQuery('#img_container_slide DIV:last');

    // use this to pull the divs in the order they appear in the markup
    var jQuerynext =  jQueryactive.next().length ? jQueryactive.next()
    : jQuery('#img_container_slide DIV:first');

    // uncomment below to pull the divs randomly
    // var jQuerysibs  = jQueryactive.siblings();
    // var rndNum = Math.floor(Math.random() * jQuerysibs.length );
    // var jQuerynext  = jQuery( jQuerysibs[ rndNum ] );

    jQueryactive.addClass('last-active');

    jQuerynext.css({opacity: 0.0})

    .addClass('active')
    .animate({opacity: 1.0}, 3000, function() {
        jQueryactive.removeClass('active last-active');
    });

}

jQuery(document).ready(function() {
    setInterval( "slideSwitch()", 5000 ); });