/* 
Michael's Rolling Archives 
by Michael Heilemann - http://binarybonsai.com
*/

var asides_pagecount = Math.ceil( 0/3 );

function rollAsides(direction)
{
	if (direction == 1 || direction == -1)
	{
		// Update the variables
		asides_position = asides_position + (direction * asides_offset);
		asides_pagenumber += direction;
	}
	else if (direction == 'home')
	{
		// Reset the variables
		asides_pagenumber = 1;
		asides_offset = 3;
		asides_position = 0;
	}

	$('rolling-asides-content').innerHTML = '<div id="rolling-asides-loading"></div>';
	$('rolling-asides-pages').innerHTML = 'page ' + asides_pagenumber + ' of ' + asides_pagecount;

	// Make sure we don't allow people to go below page 1
	if (asides_pagenumber < '2')
	{
		$('rolling-asides-next').className = 'inactive';
		$('rolling-asides-next').onclick = null;
	}
	else
	{
		$('rolling-asides-next').className = null;
		$('rolling-asides-next').onclick = function() { rollAsides(-1); };
	}

	// Make sure we don't allow people to go above pagecount.
	if (asides_pagenumber >= asides_pagecount)
	{
		$('rolling-asides-prev').className = 'inactive';
		$('rolling-asides-prev').onclick = null;
	}
	else
	{
		$('rolling-asides-prev').className = null;
		$('rolling-asides-prev').onclick = function() { rollAsides(1); };
	}

	// This part requires Prototype (http://prototype.conio.net/)
	new Ajax.Updater('rolling-asides-content', 'http://al-marayya594.org/wp/wp-content/plugins/k2-rolling-asides/rolling-asides.php', {method: 'get', parameters: 'offset=' + asides_position, onFailure: rollingAsidesError});
}

function rollingAsidesError()
{
	$('rolling-asides-content').innerHTML = 'Danger Will robinson! Danger!';
}

function initRollAsides()
{
	// Is only run onload.
	if (asides_pagecount > 0)
	{
		// There are posts
		$('rolling-asides-prev').onclick = function() { rollAsides(1); };
		rollAsides('home');
	}
	else
	{
		// No aside posts. Turn everything off.
		$('rolling-asides-content').innerHTML = 'There are no asides.';
		$('rolling-asides-next').className = 'inactive';
		$('rolling-asides-next').onclick = null;
		$('rolling-asides-prev').className = 'inactive';
		$('rolling-asides-prev').onclick = null;
	}
}

// addLoadEvent()
// Adds event to window.onload without overwriting currently assigned onload functions.
// Function found at Simon Willison's weblog, added by Safirul Alredha.
function addLoadEvent(func) {
	var oldonload = window.onload;

	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}

addLoadEvent(initRollAsides);  // run initRollArchive onLoad