asp.net unchanging countenance validator (password strength)

i have validation control following expression:

(?=(.*\\d.*){2,})(?=(.*\\w.*){2,})(?=(.*\\w.*){1,}).{8,}

that's evidence during slightest 2 digits, 2 alpha characters, 1 non-alphanumeric 8 impression minimum. unfortunately doesn't seem cross-browser compliant.

this validation works ideally firefox, nonetheless does internet explorer.

a multiple any your answers law in:

var format = "^(?=.{" + minlength + ",})" + 
    (minalpha > 0 ? "(?=(.*[a-za-z].*){" + minalpha + ",})" : "") + 
    (minnum > 0 ? "(?=(.*[0-9].*){" + minnum + ",})" : "") + 
    (minnonalpha > 0 ? "(?=(.*\\w.*){" + minnonalpha + ",})" : "") + ".*$";

ex: "^(?=.{x,})(?=(.*[a-za-z].*){y,})(?=(.*[0-9].*){z,})(?=(.*\w.*){a,}).*$"

the vicious square carrying (?.{x,}) length first.