Changes

parseInt('@password@'.match(/[0-9]/g)?1:0) + parseInt('@password@'.match(/[^a-zA-Z0-9]/g)?1:0))>=3

* Note: to require use of only 2 character sets, or all 4 character sets, simply change the integer at the end of the above statement to either 2 or 4 respectively.

First character is not a letter, at least one numeric character and at least one special character: