function setAltText(thisObject) {
	$('alt_text').set('html', thisObject.get('alt') + '<div class="clear"></div>');
	var position = thisObject.getPosition();
	$('alt_text').setStyles({
		display: 'block',
		left: position['x']
	});
	$('alt_text_corner').setStyles({
		display: 'block',
		top: position['y'] - 4,
		left: position['x'] + 4
	});
}

function unSetAltText(){
	$('alt_text').setStyle('display', 'none');
	$('alt_text_corner').setStyle('display', 'none');
}

window.addEvent('domready', function(){
	$$('[rel=alt_text]').addEvent('mouseover', function(){
		setAltText(this);
		var position = this.getPosition();
		$('alt_text').setStyle('top',  position['y'] - 3 - $('alt_text').getHeight());
	});
	
	$$('[rel=alt_text]').addEvent('mouseout', function(){
		unSetAltText();
	});
});