var larr, rarr;

function init() {
	larr = document.getElementById('larr');
	rarr = document.getElementById('rarr')
	document.getElementById('main').style.height = document.body.scrollHeight + 100;
	return false;
}


function initPhoto() {
	var coll = new Array();
	coll = document.getElementsByName('showDay');
	for(var i=0;i<coll.length;i++) {
		if (coll[i].id=='last') {
			selPhoto=coll[i];
		}
	}
	rarr.onclick = nextImage;
	larr.onclick = prevImage;
}

function nextImage() {
	if (selPhoto.id == 'last') return false;
	document.getElementById('dayPhoto').innerHTML = '<img src="'+selPhoto.nextSibling.value+'" alt="">';
	document.getElementById('dayPhotoDesc').innerHTML = document.getElementById(selPhoto.nextSibling.value).innerHTML;
	selPhoto = selPhoto.nextSibling;
	if (selPhoto.id != 'first') larr.style.display = 'block';
	if (selPhoto.id == 'last') rarr.style.display = 'none';
}

function prevImage() {
	if (selPhoto.id == 'first') return false;
	document.getElementById('dayPhoto').innerHTML = '<img src="'+selPhoto.previousSibling.value+'" alt="">';
	document.getElementById('dayPhotoDesc').innerHTML = document.getElementById(selPhoto.previousSibling.value).innerHTML;
	selPhoto = selPhoto.previousSibling;
	if (selPhoto.id == 'first') larr.style.display = 'none';
	if (selPhoto.id != 'last') rarr.style.display = 'block';
}

function navigateThrough (event)
{
	if (!document.getElementById) return;
	if (window.event) event = window.event;

	if (event.ctrlKey)
	{
		var link = null;
		switch (event.keyCode ? event.keyCode : event.which ? event.which : null)
		{
			case 0x25:
				link = document.getElementById ('prevLink');
				break;
			case 0x27:
				link = document.getElementById ('nextLink');
				break;
			case 0x26:
				link = document.getElementById ('upLink');
				break;
			default:
				return;
			break;
		}
		if (link && link.href) document.location = link.href;
	}
}

document.onkeydown = navigateThrough;