Restarting from beginning after clearInterval

link to test site

I want to restart the animation from the beginning once it stops at the last image. I tried the code below but it won't return to the first image.

$(document).ready(function () {

    window.setInterval("slideshow()", 3000);

});



function slideshow() {

    var time = window.setInterval("slideshow()", 3000);

    next = $(".next");

    inside = parseInt($(".inside").css("left"));



    if (inside == -3080) {

        window.clearInterval(time);

        inside == 0;

    }

    else {

        next.trigger("click");

    }

}