function checkUsername(username, path, option, style) {

	expression = /(&\B)|(^&)|(#\B)|(^#)/;
	if (expression.exec(username)) {
		username = 'erro';
	}
	
	$.ajax({
		url: path + '/search_username.php',
		data: 'option=' + option + '&username=' + username + "&style="+style.toString(),
		type: "get",
		success: function(response) {
			$("#checkUsername").html(response);
		}
	});
	
}