$(document).ready(function() {
	$('label').inFieldLabels();
	
	$('#nombre').keyup(function(){
		username = $(this).val().replace(/[^aA-zZ|^0-9|^ ]+/g,'').replace(/ /g,'').toLowerCase();
		if (username.length <= 0) {
			$('#username').prev().animate({opacity: 1}, 500).dequeue();
			$('#username').val('');
			$('#username-preview').html('username');
		}
		else {
			$('#username').prev().animate({opacity: 0}, 500);
			$('#username').val(username);
			$('#username-preview').html(username);
		}
	});

	$('#username').keyup(function(){
		username = $(this).val().replace(/[^aA-zZ|^0-9|^ ]+/g,'').replace(/ /g,'').toLowerCase();
		$('#username').val(username);
		$('#username-preview').html(username);
	});
});