Expresion regular para validar contraseñas
/(?=(.*[0-9]))(?=.*[\!@#$%^&*()\\[\]{}\-_+=|:;"'<>,./?])(?=.*[a-z])(?=(.*[A-Z]))(?=(.*)).{8,}/
Source: estilow3b.com
/(?=(.*[0-9]))(?=.*[\!@#$%^&*()\\[\]{}\-_+=|:;"'<>,./?])(?=.*[a-z])(?=(.*[A-Z]))(?=(.*)).{8,}/