// Copyright © 1999 Doug Popeney --  JavaScript Made Easy!! - http://www.easyjavascript.com

var i = 1;	//current image
var maxImages = 7;	//total number of images

// add all images to array
images = new Array
images[1] = "images/about.gif"
images[2] = "images/diving.jpg"
images[3] = "images/sabang.gif"
images[4] = "images/snorkeling.gif"
images[5] = "images/tamaraw.gif"
images[6] = "images/tukuran.gif"
images[7] = "images/whitebeach.gif"

function ToggleNav() { //load page
	if (i == 1) { //don't show previous option on first image
		document.gallery.previous.style.visibility = "hidden";
		document.gallery.next.style.visibility = "visible";
	}
	else if (i == maxImages) {
		document.gallery.previous.style.visibility = "visible";
		document.gallery.next.style.visibility = "hidden";
	}
	else {
		document.gallery.previous.style.visibility = "visible";
		document.gallery.next.style.visibility = "visible";
	}
}

function PrevImg() {
	if (i > 1) {
		i--;
		document.img.src = images[i];
	}
	ToggleNav();
}

function NextImg(){
	if (i != maxImages) { //last image
		i++;
		image = images[i];
		document.img.src = image;
	}
	ToggleNav();
}