gSlideshowInterval = 5;
gNumberOfImages = 6;

gImages = new Array(gNumberOfImages);
gImages[0] = "/images/slideshow/slide1.jpg";
gImages[1] = "/images/slideshow/slide2.jpg";
gImages[2] = "/images/slideshow/slide3.jpg";
gImages[3] = "/images/slideshow/slide4.jpg";
gImages[4] = "/images/slideshow/slide5.jpg";
gImages[5] = "/images/slideshow/slide6.jpg";

function canManipulateImages() {
	if (document.images)
		return true;
	else
		return false;
}
function loadSlide(imageURL) {
	if (gImageCapableBrowser) {
		document.slide.src = imageURL;
		return false;
	}
	else {
		return true;
	}
}
function nextSlide() {
	gCurrentImage = (gCurrentImage + 1) % gNumberOfImages;
	loadSlide(gImages[gCurrentImage]);
}
gImageCapableBrowser = canManipulateImages();
gCurrentImage = 0;
setInterval("nextSlide()",gSlideshowInterval * 1000);

// nav image flips
function preloadImages() {
		  if (document.images) {
		    var imgFiles = preloadImages.arguments;
			var preloadArray = new Array();
			for (var i=0; i<imgFiles.length; i++) {
			preloadArray[i] = new Image;
			preloadArray[i].src = imgFiles[i];
		    }
		  }
		}
preloadImages('/images/header/nav1_off.jpg');preloadImages('/images/header/nav2_off.jpg');preloadImages('/images/header/nav3_off.jpg');preloadImages('/images/header/nav4_off.jpg');preloadImages('/images/header/nav5_off.jpg');preloadImages('/images/header/nav6_off.jpg');preloadImages('/images/header/nav7_off.jpg');
		preloadImages('/images/header/nav1_on.jpg');preloadImages('/images/header/nav2_on.jpg');preloadImages('/images/header/nav3_on.jpg');preloadImages('/images/header/nav4_on.jpg');preloadImages('/images/header/nav5_on.jpg');preloadImages('/images/header/nav6_on.jpg');preloadImages('/images/header/nav7_on.jpg');

// set button on/off
var flag = 0;			//global variable
function setButton(id) {
	if (id == "") return;
	if(pageId != 0) {
		if (eval('document.images["nav' + pageId + '"]').src != eval('document.images["' + id + '"]').src)
		setImg(id); 
	}
	else
	setImg(id);
}

// set the right image
function setImg(id) {
	if (flag == 0) {
		eval('document.images["' + id + '"]').src='/images/header/' + id + '_on.jpg';
		flag = 1;
	}
	else {
		eval('document.images["' + id + '"]').src='/images/header/' + id + '_off.jpg';
		flag = 0
	}
}
function setPage() {
	var id = pageId;
	if(id != 0)
	eval('document.images["nav' + id + '"]').src='/images/header/nav' + id + '_on.jpg';
}