<!--
var remImage = 1;
var imgNo = '';
function createCookie(name,value,days) {
	if (days) {
		var date = new Date();
		date.setTime(date.getTime()+(days*24*60*60*1000));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	for(var i=0;i < ca.length;i++) {
		var c = ca[i];
		while (c.charAt(0)==' ') c = c.substring(1,c.length);
		if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
	}
	return null;
}

function eraseCookie(name) {
	createCookie(name,"",-1);
}
function IsNumeric(input){ 
	return (input - 0) == input && input.length > 0;
}
function prevImage()
{
	if(remImage == 1)
	{
		remImage = 39;
	}
	else
	{
		remImage--;
	}
	eraseCookie('GI');
	createCookie('GI',remImage.toString(),1);
	changeImage();
}

function nextImage()
{
	if(remImage == 39)
	{
		remImage = 1;
	}
	else
	{
		remImage++;
	}
	eraseCookie('GI');
	createCookie('GI',remImage.toString(),1);
	changeImage();
}

function changeImage()
{
	var t = readCookie('GI');
	if (IsNumeric(t)){
	remImage=parseInt(t);
	}
	else {
	remImage=1;
	}
	if (remImage < 10) {
	imgNo = '0' + remImage.toString();
	}
	else {
	imgNo = remImage.toString();
	}
	document.mainimage.src = 'images/installations/' + imgNo + '.jpg';
	document.getElementById('linkPage').href='installdetails/' + imgNo + '.html';
	document.getElementById('installDetails').href='installdetails/' + imgNo + '.html';
	switch (imgNo) {
	case'01':
	document.getElementById('worktitle').value = 'Domestic Surveillance, 2008';
	document.getElementById('installationtype').value = 'walk in installation';
	document.getElementById('material').value = 'mixed media';
	document.getElementById('dimensions').value = '12 feet X 12 feet';
	break;
	}
}
//-->