sprintfWrapper = { init: function () {
    if (typeof arguments == "undefined") { return null; }
    if (arguments.length < 1) { return null; }
    if (typeof arguments[0] != "string") { return null; }
    if (typeof RegExp == "undefined") { return null; }
    var string = arguments[0]; var exp = new RegExp(/(%([%]|(\-)?(\+|\x20)?(0)?(\d+)?(\.(\d)?)?([bcdfosxX])))/g); var matches = new Array(); var strings = new Array(); var convCount = 0; var stringPosStart = 0; var stringPosEnd = 0; var matchPosEnd = 0; var newString = ''; var match = null; while (match = exp.exec(string)) {
        if (match[9]) { convCount += 1; }
        stringPosStart = matchPosEnd; stringPosEnd = exp.lastIndex - match[0].length; strings[strings.length] = string.substring(stringPosStart, stringPosEnd); matchPosEnd = exp.lastIndex; matches[matches.length] = { match: match[0], left: match[3] ? true : false, sign: match[4] || '', pad: match[5] || ' ', min: match[6] || 0, precision: match[8], code: match[9] || '%', negative: parseInt(arguments[convCount]) < 0 ? true : false, argument: String(arguments[convCount]) };
    }
    strings[strings.length] = string.substring(matchPosEnd); if (matches.length == 0) { return string; }
    if ((arguments.length - 1) < convCount) { return null; }
    var code = null; match = null; var i = null; for (i = 0; i < matches.length; i++) {
        if (matches[i].code == '%') { substitution = '%'; }
        else if (matches[i].code == 'b') { matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(2)); substitution = sprintfWrapper.convert(matches[i], true); }
        else if (matches[i].code == 'c') { matches[i].argument = String(String.fromCharCode(parseInt(Math.abs(parseInt(matches[i].argument))))); substitution = sprintfWrapper.convert(matches[i], true); }
        else if (matches[i].code == 'd') { matches[i].argument = String(Math.abs(parseInt(matches[i].argument))); substitution = sprintfWrapper.convert(matches[i]); }
        else if (matches[i].code == 'f') { matches[i].argument = String(Math.abs(parseFloat(matches[i].argument)).toFixed(matches[i].precision ? matches[i].precision : 6)); substitution = sprintfWrapper.convert(matches[i]); }
        else if (matches[i].code == 'o') { matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(8)); substitution = sprintfWrapper.convert(matches[i]); }
        else if (matches[i].code == 's') {
            matches[i].argument = matches[i].argument.substring(0, matches[i].precision ? matches[i].precision : matches[i].argument.length)
            substitution = sprintfWrapper.convert(matches[i], true);
        }
        else if (matches[i].code == 'x') { matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(16)); substitution = sprintfWrapper.convert(matches[i]); }
        else if (matches[i].code == 'X') { matches[i].argument = String(Math.abs(parseInt(matches[i].argument)).toString(16)); substitution = sprintfWrapper.convert(matches[i]).toUpperCase(); }
        else { substitution = matches[i].match; }
        newString += strings[i]; newString += substitution;
    }
    newString += strings[i]; return newString;
}, convert: function (match, nosign) {
    if (nosign) { match.sign = ''; } else { match.sign = match.negative ? '-' : match.sign; }
    var l = match.min - match.argument.length + 1 - match.sign.length; var pad = new Array(l < 0 ? 0 : l).join(match.pad); if (!match.left) { if (match.pad == "0" || nosign) { return match.sign + pad + match.argument; } else { return pad + match.sign + match.argument; } } else { if (match.pad == "0" || nosign) { return match.sign + match.argument + pad.replace(/0/g, ' '); } else { return match.sign + match.argument + pad; } } 
} 
}; sprintf = sprintfWrapper.init;