// JavaScript Document
// define the necessary variables below
var imgPath = 'images/';
var gvKeakaArray = new Array('stu_keaka-4-2.jpg','stu_keaka-4-1.jpg');
var ovAlohalani2Array = new Array('stu_aloha_lani-1.jpg','stu_aloha_lani-2.jpg');
var bflahainaArray = new Array('stu_lahaina-1.jpg','stu_lahaina-2.jpg');
var ovkeaka123Array = new Array('stu_ov_keaka-1.jpg','stu_ov_keaka-2.jpg');
var ofpun2lan1Array = new Array('stu_of_pun2lan1-1.jpg','stu_of_pun2lan1-2.jpg');
var ovalohaArray = new Array('sui_ov_aloha-1.jpg','sui_ov_aloha-2.jpg','sui_ov_aloha-3.jpg');
var ovlani2Array = new Array('sui_ov_lani-2-1.jpg','sui_ov_lani-2-2.jpg','sui_ov_lani-2-3.jpg','sui_ov_lani-2-4.jpg');
var ovkeaka123BArray = new Array('sui_ov_keaka-123-1.jpg','sui_ov_keaka-123-2.jpg');
var bflahahonoArray = new Array('sui_bf_haha-hono-1.jpg','sui_bf_haha-hono-2.jpg');
var oflani1Array = new Array('sui_of_lani1-2.jpg','sui_of_lani1-3.jpg','sui_of_lani1-4.jpg','sui_of_lani1-5.jpg');
var ofpunaArray = new Array('sui_of_puna-1.jpg','sui_of_puna-2.jpg','sui_of_puna-3.jpg');
var ofpuna2Array = new Array('sui_of_puna2-1.jpg','sui_of_puna2-2.jpg','sui_of_puna2-3.jpg');


// imgName is the name specified in the img tag... should be in quotes
// imgArray is the variable that is the array of images to rotate through... should not be in quotes
// dir tells whether to move forward or back; 1=forward; 2=back; default=1
function showNext (imgName, imgArray, dir) {
	// set dir to default of 1 if no parameter passed
	if (dir==null)
		dir = 1;
	// figure out which image is currently being shown
	var currentImg = document[imgName].src;
	var currentImgSplit = currentImg.split('/');
	for (x=0; x<currentImgSplit.length; x++) {
		currentImg = currentImgSplit[x];
	}
	// figure out where this image is in the array
	var currentIndex
	for (x=0; x<imgArray.length; x++) {
		if (currentImg==imgArray[x])
			currentIndex = x;
	}
	// get the appropriate index depending on direction and array length
	var newIndex
	if (dir==1) {
		if (currentIndex<imgArray.length-1)
			newIndex = currentIndex+1;
		else
			newIndex = 0;
	} else {
		if (currentIndex==0)
			newIndex = imgArray.length-1;
		else
			newIndex = currentIndex-1;
	}
	document[imgName].src = imgPath+imgArray[newIndex];
}