function cambia(valor){
	//alert('entro???');
	document.getElementById('menu-latest-activity').className = '';
	document.getElementById('menu-latest-photos').className = '';
	document.getElementById('menu-latest-blogs').className = '';
	document.getElementById('menu-latest-grupos').className = '';	
	document.getElementById('menu-latest-foros').className = '';		
	pestanna = 'menu-latest-' + valor;
	//alert(pestanna);
	document.getElementById(pestanna).className = 'activo';
	bloquepestanna = 'latest-' + valor;
	//alert(bloquepestanna);
	document.getElementById('latest-activity').style.display = 'none';
	document.getElementById('latest-photos').style.display = 'none';
	document.getElementById('latest-blogs').style.display = 'none';
	document.getElementById('latest-grupos').style.display = 'none';	
	document.getElementById('latest-foros').style.display = 'none';		
	document.getElementById(bloquepestanna).style.display = 'block';
}