Regular Expression for Password Strength Validation

Question

I have written a regular expression which could potentially be used for password strength validation:

^(?:([A-Z])*([a-z])*(\\d)*(\\W)*){8,12}$

Answer 1

my example

JS/jQuery

$( "#password" ).change(function ()
{
    strongPassword();
});

/**
 * @author websky
 */
function strongPassword() {
    var p = document.getElementById('password').value;
    var label1 = 0; 
    var label2 = 0; 
    var label3 = 0; 
    var label4 = 0; 
    var label5 = 0;
    if (p.length > 6) {//min length
        label1 = 1;
    }
    if (/[!@#$%^&*?_~]{2,}/.test(p)) {//min 2 special characters
        label2 = 1;
    }
    if (/[a-z]{2,}/.test(p)) {//min 2 a-z
        label3 = 1;
    }
    if (/[A-Z]{2,}/.test(p)) {//min 2 A-Z
        label4 = 1;
    }
    if (/[0-9]{2,}/.test(p)) {//min 2 0-9
        label5 = 1; 
    }

    var strong_password = label1 + label2 + label3 + label4 + label5;

    if(strong_password > 0){
        //Here your action
        //
        //var progressbar = strong_password * 20; 
        //$( "#progressbar" ).progressbar({value: progressbar}); <== I use jQuery progessbar
    } 
}