Tool.js（javascript帮助类）

 //string.format

 $.format = function (source, params) {
            if (arguments.length == 1)
                return function () {
                    var args = $.makeArray(arguments);
                    args.unshift(source);
                    return $.validator.format.apply(this, args);
                };
            if (arguments.length > 2 && params.constructor != Array) {
                params = $.makeArray(arguments).slice(1);
            }
            if (params.constructor != Array) {
                params = [params];
            }
            $.each(params, function (i, n) {
                source = source.replace(new RegExp("\\{" + i + "\\}", "g"), (typeof n == 'undefined' || n == null) ? '' : n);
            });
            return source;
        }

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