function over(aArg) {
	aArg.src = aArg.src.replace('.gif','o.gif');
}
function out(aArg) {
	aArg.src = aArg.src.replace('o.gif','.gif');
}

pic1 = new Image();
pic1.src="./images/nav1o.gif";
pic2 = new Image();
pic2.src="./images/nav2o.gif";
pic3 = new Image();
pic3.src="./images/nav3o.gif";
pic4 = new Image();
pic4.src="./images/nav4o.gif";
pic5 = new Image();
pic5.src="./images/nav5o.gif";
pic6 = new Image();
pic6.src="./images/nav6o.gif";
pic7 = new Image();
pic7.src="./images/nav7o.gif";
pic8 = new Image();
pic8.src="./images/nav8o.gif";

var prev_id = 0;
var next_id = 0;
var x = 0;
var dspd = 10; // default scroll speed
var spd = 0; // scroll speed
var ttl = 5; // total
var wth = 144; // thumb width

var imgDiv;
var scrDiv;

function init() {
	imgDiv = document.getElementById('images1');
	scrDiv = document.getElementById('images2');
	
	var imgBox = document.getElementById('imageBox');
	imgDiv.style.left = '0px';
	scrDiv.style.left = '0px';
	scrDiv.innerHTML = imgDiv.innerHTML;
	imgDiv.style.width = ((wth * ttl) + 2) + 'px';
	scrDiv.style.width = imgDiv.style.width;
	imgBox.style.width = parseInt(scrDiv.style.width) + parseInt(imgDiv.style.width) + 2 + 'px';
	spd = dspd;
}
function move(aArg) {
	aArg.src = aArg.src.replace('.gif','o.gif');
	if (aArg.id=='prev') {
		prev_id = setInterval( "left()", 35 );
	} else if (aArg.id=='next') {
		next_id = setInterval( "right()", 35 );
	}
}
function stopmove(aArg) {
	aArg.src = aArg.src.replace('o.gif','.gif');
	clearInterval(next_id);
	clearInterval(prev_id);
	x = 0;
	spd = dspd;
}
function right() {
	var newpos = parseInt(imgDiv.style.left) - (spd);
	imgDiv.style.left = newpos + 'px';
	scrDiv.style.left = newpos + 'px';
	if (parseInt(imgDiv.style.left) < parseInt(imgDiv.style.width) * -1) { 
		imgDiv.style.left = (spd * -1) + 'px';
		scrDiv.style.left = (spd * -1) + 'px';
	}
	speed();
	x++
}

function left() {	
	var newpos = parseInt(imgDiv.style.left) + (spd);
	imgDiv.style.left = newpos + 'px';
	scrDiv.style.left = newpos + 'px';
	if (parseInt(imgDiv.style.left) > 0) { 
		var os = parseInt(imgDiv.style.left);
		var newpos = (parseInt(imgDiv.style.width) - os) * -1;
		imgDiv.style.left = newpos + 'px';
		scrDiv.style.left = newpos + 'px';
	}
	speed();
	x++
}

function showImage(aArg) {
	var tourimage = document.getElementById('tourimage');
	tourimage.src = aArg.src;
}

function speed() {
	if (x>110) { spd=dspd+20; }
	else if (x>108) { spd=dspd+18; }
	else if (x>106) { spd=dspd+16; }
	else if (x>104) { spd=dspd+14; }
	else if (x>102) { spd=dspd+12; }	
	else if (x>70) { spd=dspd+10; }
	else if (x>68) { spd=dspd+8; }
	else if (x>66) { spd=dspd+6; }
	else if (x>64) { spd=dspd+4; }
	else if (x>62) { spd=dspd+2; }
}