Event.observe(window, 'load', function() { // prototype syntax
	$$('.photos_box a').invoke('observe','mouseover',mouseon);
	$$('.photos_box a').invoke('observe','mouseout',mouseoff);
});

function mouseon(event){
	event.element().setStyle({borderColor:'#00aeef'});
}

function mouseoff(event){
	event.element().setStyle({borderColor:'#E2E5E4'});
}