generatePassword.js

function generatePassword(length)
{
    var length = typeof length !== 'undefined' ? length : 8;
    var charset = "abcdefghijklnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789",
        retVal = "";
    for (var i = 0, n = charset.length; i < length; ++i)
    {
        retVal += charset.charAt(Math.floor(Math.random() * n));
    }
    return retVal;
}