// JavaScript Document

//JavaScript Banner Ad Rotator version 2.1 - last modified 16 November 2000
//Obtained from http://www.brettb.com/js_banner_ad_rotator.asp
//Email comments or suggestions using the form at http://www.brettb.com/Contact.asp
//If you want a version of this script that will open links in a new browser window
//then please visit http://www.winnershtriangle.com/w/Products.JavaScriptBannerAdRotator.asp

//User defined variables - change these variables to alter the behaviour of the script
var ImageFolder = ""; //Folder name containing the images
var ImageFileNames = new Array('/banner/Ad_usafunds.gif', '/banner/Ad_nslp.gif', '/banner/Ad_usafunds.gif'); //List of images to use
var ImageURLs = new Array('http://www.usafunds.org/', 'http://www.nslp.org/', 'http://www.usafunds.org/'); //List of hyperlinks associated with the list of images
var DefaultURL = 'http://www.usafunds.org/'; //Default hyperlink for the Banner Ad
var DisplayInterval = 11; //Number of seconds to wait before the next image is displayed
var TargetFrame = "_blank"; //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 BannerAdImages = new Array(NumberOfImages);
var DisplayInterval = DisplayInterval * 1000;
var NumberOfImages = ImageFileNames.length;

//A dd 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 = setTimeout("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;

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

window.document.bannerad.src = BannerAdImages[BannerAdCode].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;
}

}