// On start up, initialize the qualiy meter
addEvent(window, "load", initQualityMeter);

//init
function initQualityMeter()
{
    var _pwd = document.getElementById('tbx_pwd');
    if (_pwd)
    {
        addEvent(_pwd, "keypress", updateQualityMeter);
        initProgressBar("");
        updateQualityMeter();
    }
}


function updateQualityMeter()
{
    var quality = getPasswordStrength();
    setProgressBarValue(quality);
}

// Function taken from Mozilla Code:
// http://lxr.mozilla.org/seamonkey/source/security/manager/pki/resources/content/password.js
function getPasswordStrength()
{
    // Here is how we weigh the quality of the password
    // number of characters
    // numbers
    // non-alpha-numeric chars
    // upper and lower case characters

    var pw = document.getElementById('tbx_pwd').value;
    //  alert("password='" + pw +"'");

    //length of the password
    var pwlength=(pw.length);
    if (pwlength>5)
        pwlength=5;


    //use of numbers in the password
    var numnumeric = pw.replace (/[0-9]/g, "");
    var numeric=(pw.length - numnumeric.length);
    if (numeric>3)
        numeric=3;

    //use of symbols in the password
    var symbols = pw.replace (/\W/g, "");
    var numsymbols=(pw.length - symbols.length);
    if (numsymbols>3)
        numsymbols=3;

    //use of uppercase in the password
    var numupper = pw.replace (/[A-Z]/g, "");
    var upper=(pw.length - numupper.length);
    if (upper>3)
        upper=3;


    var pwstrength=((pwlength*10)-20) + (numeric*10) + (numsymbols*15) + (upper*10);

    // make sure we're give a value between 0 and 100
    if ( pwstrength < 0 ) {
        pwstrength = 0;
    }

    if ( pwstrength > 100 ) {
        pwstrength = 100;
    }

    return pwstrength;
}