window.addEvent('domready', function() {
	// change the background color of the divs class=item on mouse over
	$$('.item').addEvent('mouseenter', function() {
		this.setStyle('background-color','#f5f5f5');
	});

	$$('.item').addEvent('mouseleave', function() {
		this.setStyle('background-color','#ffffff');
	});

	// add a target="_blank" to all the 'a' element with 'rel=external'
	$$('a[rel=external]').each(function(element) {
		element.setProperty('target', '_blank');
	});
});