var aryImages = new Array(3);
  		aryImages[0] = "images/twin_room.jpg";
  		aryImages[1] = "images/single_room.jpg";
  		aryImages[2] = "images/family_room.jpg";
	function swap(imgIndex) 
		{
    	document['imgMain'].src = aryImages[imgIndex];
  		}

<!-- 
var random_display = 0;
var image_dir = "images/"
var ImageNum = 0;
imageArray = new Array();
imageArray[ImageNum++] = new imageItem(image_dir + "twin_room.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "single_room.jpg");
imageArray[ImageNum++] = new imageItem(image_dir + "family_room.jpg");

var number_of_image = imageArray.length;
function imageItem(image_location) {
this.image_item = new Image();
this.image_item.src = image_location;
}
function get_ImageItemLocation(imageObj) {
return(imageObj.image_item.src)
}
function randNum(x, y) {
var range = y - x + 1;
return Math.floor(Math.random() * range) + x;
}
function getNextImage() {
if (random_display) {
ImageNum = randNum(0, number_of_image-1);
}
else {
ImageNum = (ImageNum+1) % number_of_image;
}
var new_image = get_ImageItemLocation(imageArray[ImageNum]);
return(new_image);
}

function getPrevImage() {
ImageNum = (ImageNum-1) % number_of_image;
var new_image = get_ImageItemLocation(imageArray[ImageNum]);
return(new_image);
}

function prevImage(place) {
var new_image = getPrevImage();
document[place].src = new_image;
}

function rotateImage(place) {
var new_image = getNextImage();
document[place].src = new_image;
var recur_call = "rotateImage('"+place+"')";
timerID = setTimeout(recur_call, interval);
}


function popUp(URL) {
day = new Date();
id = day.getTime();
eval("page" + id + " = window.open(URL, '" + id + "', 'toolbar=0,scrollbars=0,location=0,statusbar=0,menubar=0,resizable=0,width=650,height=287,left=150,top=209');");
}
function makevisible(cur,which){
strength=(which==0)? 1 : 0.2

if (cur.style.MozOpacity)
cur.style.MozOpacity=strength
else if (cur.filters)
cur.filters.alpha.opacity=strength*100
}
function Checkit() {	

if (document.book.timestamp2.value=="")
{
alert("Please fill date you would like to stay");
document.book.timestamp2.focus();return false
}
/*
var strDate = getDay()+"-"+getMonth()+"-"+getYear();
if (document.book.timestamp2.value<=strDate)
{
alert("Date cannot be before today");
document.book.timestamp2.focus();return false
}
*/
if (document.book.roomtype.value=="")
{
alert("Please select room type");
document.book.roomtype.focus();return false
}
}

function proceed(){
if (document.book.title.value=="")
{
alert("Please fill title");
document.book.title.focus();return false
}
if (document.book.fname.value=="")
{
alert("Please fill your first name");
document.book.fname.focus();return false
}
if (document.book.lname.value=="")
{
alert("Please fill your last name");
document.book.lname.focus();return false
}
if (document.book.email.value=="")
{
alert("Please fill your email address");
document.book.email.focus();return false
}
if (document.book.email.value!="")
{if (document.book.email.value.indexOf("@")==-1 ||
	document.book.email.value.indexOf(".")==-1 ||
	document.book.email.value.indexOf(" ")!==-1 ||
	document.book.email.value.lenght<20)
{alert("Sorry, email address is not valid.");
document.book.email.focus();return false} 	
}
}
//   -->