$.fn.passwordStrength = function (options) {
    return this.each(function () {
        var that = this; that.opts = {};
        that.opts = $.extend({}, $.fn.passwordStrength.defaults, options);

        that.div = $(that.opts.targetDiv);
        that.input = $("#" + that.opts.targetInput);
        that.defaultClass = that.div.attr('class');

        that.percents = (that.opts.classes.length) ? 100 / that.opts.classes.length : 100;

        v = $(this)
        .keyup(function () {
            if (typeof el == "undefined")
                this.el = $(this);
            var s = getPasswordStrength(this.value);
            var p = this.percents;
            var t = Math.floor(s / p);

            if (100 <= s)
                t = this.opts.classes.length - 1;

            this.div
            .removeAttr('class')
            .addClass(this.defaultClass)
            .addClass(this.opts.classes[t]);
            this.input.val(this.opts.classes[t]);
        })
    });

    function getPasswordStrength(H) {
        var D = (H.length);

        if (D < 4) { D = 0 }

        if (D > 5) {
            D = 5
        }
        var F = H.replace(/[0-9]/g, "");
        var G = (H.length - F.length);
        if (G > 3) { G = 3 }
        var A = H.replace(/\W/g, "");
        var C = (H.length - A.length);
        if (C > 3) { C = 3 }
        var B = H.replace(/[A-Z]/g, "");
        var I = (H.length - B.length);
        if (I > 3) { I = 3 }
        var E = ((D * 10) - 20) + (G * 10) + (C * 15) + (I * 10);
        if (E < 0) { E = 0 }
        if (E > 100) { E = 100 }
        return E
    }

};