//JavaScript Banner Ad Rotator version 2.1 - last modified 16 November 2000
//Obtained from http://www.brettb.com/js_banner_ad_rotator.asp

//User defined variables - change these variables to alter the behaviour of the script
var ImageFolder = "images"; //Folder name containing the images
var ImageFileNames = new Array("acoustic_research.jpg", "power_acoustik.jpg", "audiovoxlogo.jpg", "nuvo.jpg", "terk.jpg", "rcalogo.jpg", "dynaudio.jpg", "farenheitlogo.jpg", "kole.jpg", "spl.jpg", "treo.jpg", "crimestopper.jpg", "usaspec.gif", "barkan_logo_s.jpg", "hole_pro_logo.jpg"); //List of images to use
//var ImageURLs = new Array('http://www.amazon.com/exec/obidos/redirect?tag=brettbcom&path=subst/home/home.html', 'http://winnershtriangle.com/w/Products.ASPDocumentationTool.asp', 'http://www.amazon.com/exec/obidos/redirect?tag=brettbcom&path=subst/home/home.html', 'http://www.winnershtriangle.com/w/'); //List of hyperlinks associated with the list of images
//var DefaultURL = 'http://www.amazon.com/exec/obidos/redirect?tag=brettbcom&path=subst/home/home.html'; //Default hyperlink for the Banner Ad
var DisplayInterval = 4; //Number of seconds to wait before the next image is displayed
var TargetFrame = ""; //Name of the frame to open the hyperlink into

//Internal variables (do not change these unless you know what you are doing)
var IsValidBrowser = false;
var BannerAdCode = 0;
var BannerAdCode2 = 5;
var BannerAdCode3 = 9;
var BannerAdCode4 = 12;
var BannerAdCode5 = 13;
var BannerAdCode6 = 14;
var BannerAdImages = new Array(NumberOfImages);
var DisplayInterval = DisplayInterval * 1000;
var NumberOfImages = ImageFileNames.length;

//Add a trailing forward slash to the ImageFolder variable if it does not already have one
if (ImageFolder.substr(ImageFolder.length - 1, ImageFolder.length) != "/" && ImageFolder != "") { ImageFolder += "/";
}

if (TargetFrame == '') {
var FramesObject = null;
} else {
var FramesObject = eval('parent.' + TargetFrame);
}

//Function runs when this page has been loaded and does the following:
//1. Determine the browser name and version  (since the script will only work on Netscape 3+ and Internet Explorer 4+).
//2. Start the timer object that will periodically change the image displayed by the Banner Ad.
//3. Preload the images used by the Banner Ad rotator script
function InitialiseBannerAdRotator() {

//Determine the browser name and version
//The script will only work on Netscape 3+ and Internet Explorer 4+
var BrowserType = navigator.appName;
var BrowserVersion = parseInt(navigator.appVersion);

if (BrowserType == "Netscape" && (BrowserVersion >= 3)) {
IsValidBrowser = true;
}

if (BrowserType == "Microsoft Internet Explorer" && (BrowserVersion >= 4)) {
IsValidBrowser = true;
}

if (IsValidBrowser) {

TimerObject = setInterval("ChangeImage()", DisplayInterval);
BannerAdCode = 0;

for (i = 0; i < NumberOfImages; i++) {

BannerAdImages[i] = new Image();
BannerAdImages[i].src = ' ' + ImageFolder + ImageFileNames[i];

}

}

}

//Function to change the src of the Banner Ad image
function ChangeImage() {

if (IsValidBrowser) {
BannerAdCode = BannerAdCode + 1;
BannerAdCode2 = BannerAdCode2 + 1;
BannerAdCode3 = BannerAdCode3 + 1;
BannerAdCode4 = BannerAdCode4 + 1;
BannerAdCode5 = BannerAdCode5 + 1;
BannerAdCode6 = BannerAdCode6 + 1;

if (BannerAdCode == NumberOfImages) {
BannerAdCode = 0;
}

if (BannerAdCode2 == NumberOfImages) {
BannerAdCode2 = 0;
}

if (BannerAdCode3 == NumberOfImages) {
BannerAdCode3 = 0;
}

if (BannerAdCode4 == NumberOfImages) {
BannerAdCode4 = 0;
}

if (BannerAdCode5 == NumberOfImages) {
BannerAdCode5 = 0;
}

if (BannerAdCode6 == NumberOfImages) {
BannerAdCode6 = 0;
}


window.document.bannerad.src = BannerAdImages[BannerAdCode].src;
window.document.bannerad2.src = BannerAdImages[BannerAdCode2].src;
window.document.bannerad3.src = BannerAdImages[BannerAdCode3].src;
window.document.bannerad4.src = BannerAdImages[BannerAdCode4].src;
window.document.bannerad5.src = BannerAdImages[BannerAdCode5].src;
window.document.bannerad6.src = BannerAdImages[BannerAdCode6].src;
//TimerObject = setTimeout("ChangeImage()", DisplayInterval);
}
}

//Function to redirect the browser window/frame to a new location,
//depending on which image is currently being displayed by the Banner Ad.
//If Banner Ad is being displayed on an old browser then the DefaultURL is displayed
function ChangePage() {

if (IsValidBrowser) {

if (TargetFrame != '' && (FramesObject)) {
FramesObject.location.href = ImageURLs[BannerAdCode];
} else {
document.location = ImageURLs[BannerAdCode];
}

} else if (!IsValidBrowser) {
document.location = DefaultURL;
}

}