ampify.bookmarklet.js

javascript:!function(){function t(t,r){return t/r}function r(r,n){return t(r,n)*r}function n(){var n=window.prompt("Voltage?",4.2),o=window.prompt("Ohms?",.2);if(isNaN(n)&&(n=parseInt(n)),isNaN(o)&&(o=parseInt(o)),n&&o){var i="Stats:\r";i+="Amps:    "+t(n,o).toFixed(2)+"\r",i+="Ohms:    "+o+"\r",i+="Volts:    "+n+"\r",i+="Watts:    "+r(n,o).toFixed(2)+"\r",window.alert(i)}}n()}();

ampify.js

(function() {
    function ampify(v, r) {
        return v / r;
    }
    function wattify(v, r) {
        return ampify(v,r) * v;
    }
    function init() {
        var volts = window.prompt('Voltage?', 4.2);
        var ohms = window.prompt('Ohms?', .2);
        if (isNaN(volts)) volts = parseInt(volts); 
        if (isNaN(ohms)) ohms = parseInt(ohms); 
        if (volts && ohms) {
            var alertText = 'Stats:\r'; 
            alertText += 'Amps:    ' + ampify(volts, ohms).toFixed(2) + '\r';
            alertText += 'Ohms:    ' + ohms + '\r';
            alertText += 'Volts:    ' + volts + '\r';
            alertText += 'Watts:    ' + wattify(volts, ohms).toFixed(2) + '\r';
            window.alert(alertText);
        }
    }
    init();
})();