var interval_s = 2500; 
var random_display_s = 0;
var image_dir_s = "portraits/";
var ImageNum_s = 0;
spotlightArray = new Array();

spotlightArray[ImageNum_s++] = new imageItem_s(image_dir_s + "161.jpg");
spotlightArray[ImageNum_s++] = new imageItem_s(image_dir_s + "156.jpg");
spotlightArray[ImageNum_s++] = new imageItem_s(image_dir_s + "155.jpg");
spotlightArray[ImageNum_s++] = new imageItem_s(image_dir_s + "134.jpg");
spotlightArray[ImageNum_s++] = new imageItem_s(image_dir_s + "126.jpg");
spotlightArray[ImageNum_s++] = new imageItem_s(image_dir_s + "120.jpg");

var number_of_images_s = spotlightArray.length;

function imageItem_s(image_location) {
        this.image_item = new Image();
        this.image_item.src = image_location;
        
}

function get_ImageItemLocation_s(imageObj) {
        return(imageObj.image_item.src);
}

function randNum_s(x, y) {
        var range = y - x + 1;
        return Math.floor(Math.random() * range) + x;
}

function getNextImage_s() {
        if (random_display_s) {
                ImageNum_s = randNum_s(0, number_of_images_s-1);
        } else {
                ImageNum_s = (ImageNum_s+1) % number_of_images_s;
        }
        var new_image = get_ImageItemLocation_s(spotlightArray[ImageNum_s]);
        return(new_image);
}

function getPrevImage_s() {
        if (ImageNum_s == 0) {
                ImageNum_s = (number_of_images_s-1);
        } else {
                ImageNum_s = (ImageNum_s-1);
        }
        
        var new_image = get_ImageItemLocation_s(spotlightArray[ImageNum_s]);
        return(new_image);
}

function prevImage_s(place) {
        var new_image = getPrevImage_s();
        var oImg = this.document.getElementById(place);
        oImg.src = new_image;
}

function rotateImage_s(place) {
        var new_image = getNextImage_s();
        var oImg = this.document.getElementById(place);
        oImg.src = new_image;
        var recur_call = "rotateImage_s('"+place+"')";
        timerIDs = setTimeout(recur_call, interval_s);
}