Some useful regular expressions

HTML tags:

/<\/?[a-zA-Z][a-zA-Z0-9]*(\s+[a-zA-Z0-9]+=("|')[^("|')]+("|'))*(\s*\/)*>/g

Valid name:

/^(?:[A-Za-z]+(?:\s|$)){1,4}$/

Valid email:

/^([a-z0-9\+_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$/ix