var interval = 1500; 
var random_display = 0;
var image_dir = ""
var ImageNum = 0;
imageArray = new Array();
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6575.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6581.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6582.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6583.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6585.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6588.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6589.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6592.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6596.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6598.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6681.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6689.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6698.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2006eveningprimrose6711.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/pushkinias.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_daffodils_9886.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_daf_1151.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/tulips.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_daffodils_9893.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_daf_1148.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_tulips_phlox_0895.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_spectulp_1144.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/20050718_hostas_shade_7783.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_hosta_1170.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/20020515_azaelas_in_bloom_5729.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_azalea_1163.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/20040718_july_flowers_7028.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_curve_1147.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/1997_venus_flytraps.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_venus_1174.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_pitcherplants_9662.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_pitcherclose_9670.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_dec_pitch_1140.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "images/plants/2005_purplepitcher_9655.jpg");


var number_of_image = imageArray.length;
function imageItem(image_location) {
this.image_item = new Image();
this.image_item.src = image_location;
}
function get_ImageItemLocation(imageObj) {
return(imageObj.image_item.src)
}
function randNum(x, y) {
var range = y - x + 1;
return Math.floor(Math.random() * range) + x;
}
function getNextImage() {
if (random_display) {
ImageNum = randNum(0, number_of_image-1);
}
else {
ImageNum = (ImageNum+1) % number_of_image;
}
var new_image = get_ImageItemLocation(imageArray[ImageNum]);
return(new_image);
}

function getPrevImage() {
ImageNum = (ImageNum-1) % number_of_image;
var new_image = get_ImageItemLocation(imageArray[ImageNum]);
return(new_image);
}

function prevImage(place) {
var new_image = getPrevImage();
document[place].src = new_image;
}

function rotateImage(place) {
var new_image = getNextImage();
document[place].src = new_image;
var recur_call = "rotateImage('"+place+"')";
timerID = setTimeout(recur_call, interval);
}