var tabs = {
	'#trigger-item-summary' : function (element)
	{
		element.onclick = function ()
		{
			document.getElementById('item-summary').style.display = "block";
			document.getElementById('item-contents').style.display = "none";
			document.getElementById('item-author').style.display = "none";

			document.getElementById('trigger-item-summary').parentNode.className = "hi";
			document.getElementById('trigger-item-contents').parentNode.className = "";
			document.getElementById('trigger-item-author').parentNode.className = "";

			return false;
		}
	},
	'#trigger-item-contents' : function (element)
	{
		element.onclick = function ()
		{
			document.getElementById('item-summary').style.display = "none";
			document.getElementById('item-contents').style.display = "block";
			document.getElementById('item-author').style.display = "none";

			document.getElementById('trigger-item-summary').parentNode.className = "";
			document.getElementById('trigger-item-contents').parentNode.className = "hi";
			document.getElementById('trigger-item-author').parentNode.className = "";

			return false;
		}
	},
	'#trigger-item-author' : function (element)
	{
		element.onclick = function ()
		{
			document.getElementById('item-summary').style.display = "none";
			document.getElementById('item-contents').style.display = "none";
			document.getElementById('item-author').style.display = "block";

			document.getElementById('trigger-item-summary').parentNode.className = "";
			document.getElementById('trigger-item-contents').parentNode.className = "";
			document.getElementById('trigger-item-author').parentNode.className = "hi";

			return false;
		}
	}
}

function on_load ()
{
	document.getElementById('item-summary').style.display = "block";
	document.getElementById('item-contents').style.display = "none";
	document.getElementById('item-author').style.display = "none";

	document.getElementById('trigger-item-summary').parentNode.className = "hi";
}

Behaviour.register(tabs);
Behaviour.addLoadEvent(function() {on_load()});