Javascript String replaceAll(exp, newStr)

String.prototype.replaceAll = function (exp, newStr) {
    return this.replace(new RegExp(exp, "gm"), newStr);
};

String.prototype.format = function(args) {
    var result = this;
    if (arguments.length < 1) {
        return result;
    }//from   ww  w  .  j av a2s. c om

    var data = arguments; 
    if (arguments.length == 1 && typeof (args) == "object") {
        data = args;
    }
    for ( var key in data) {
        var value = data[key];
        if (undefined != value) {
            result = result.replaceAll("\\{" + key + "\\}", value);
        }
    }
    return result;
}