window.addEvent('load', function() {
	var request = new Request.HTML({
			'url'		:	"ajax-carga-carreras-derecha.php",
			'method'	:	'post',
			'link'		:	'chain',
			'update'	: 	'divCarreras',
			'onSuccess'	:	function() {
					var ar = ['divFlotanteJava', 'divFlotanteNet', 'divFlotanteDweb', 'divFlotantePweb', 'divFlotanteLinux', 'divFlotanteFlash', 'divFlotanteOracle', 'divFlotanteSQL'];
					
					ar.each(function(id) {
						
						$(id).addEvent('mouseenter', function() {
								this.setStyles({'backgroundImage': 'url(images/botonera-carreras.gif)', 'backgroundPosition': '0 -365px', 'opacity': 0.5});
						});
						$(id).addEvent('mouseleave', function() {
								this.setStyles({'backgroundImage': '', 'backgroundPosition': '', 'opacity': 1});
						});
					});
			}
	});
	request.send();
});