/* Script form json.org. Thanks! */
if(!Object.prototype.toJSONString) {
	Array.prototype.toJSONString = function () {
		var a = ['['], b, i, l = this.length, v;

		function p(s) {
			if (b) {
				a.push(',');
			}
			a.push(s);
			b = true;
		}

		for (i = 0; i < l; i += 1) {
			v = this[i];
			switch (typeof v) {
			case 'undefined':
			case 'function':
			case 'unknown':
				break;
			case 'object':
				if (v) {
					if (typeof v.toJSONString === 'function') {
						p(v.toJSONString());
					}
				} else {
					p("null");
				}
				break;
			default:
				p(v.toJSONString());
			}
		}
		a.push(']');
		return a.join('');
	};

	Boolean.prototype.toJSONString = function () {
		return String(this);
	};

	Date.prototype.toJSONString = function () {

		function f(n) {
			return n < 10 ? '0' + n : n;
		}

		return '"' + this.getFullYear() + '-' +
				f(this.getMonth() + 1) + '-' +
				f(this.getDate()) + 'T' +
				f(this.getHours()) + ':' +
				f(this.getMinutes()) + ':' +
				f(this.getSeconds()) + '"';
	};

	Number.prototype.toJSONString = function () {
		return isFinite(this) ? String(this) : "null";
	};

	Object.prototype.toJSONString = function () {
		var a = ['{'], b, i, v;

		function p(s) {
			if(b) {
				a.push(',');
			}
			a.push(i.toJSONString(), ':', s);
			b = true;
		}

		for (i in this) {
			if (this.hasOwnProperty(i)) {
				v = this[i];
				switch (typeof v) {
				case 'undefined':
				case 'function':
				case 'unknown':
					break;
				case 'object':
					if (v) {
						if (typeof v.toJSONString === 'function') {
							p(v.toJSONString());
						}
					} else {
						p("null");
					}
					break;
				default:
					p(v.toJSONString());
				}
			}
		}
		a.push('}');
		return a.join('');
	};

	(function (s) {
		var m = {
			'\b': '\\b',
			'\t': '\\t',
			'\n': '\\n',
			'\f': '\\f',
			'\r': '\\r',
			'"' : '\\"',
			'\\': '\\\\'
		};

		s.toJSONString = function () {
			if (/["\\\x00-\x1f]/.test(this)) {
				return '"' + this.replace(/([\x00-\x1f\\"])/g, function(a, b) {
					var c = m[b];
					if (c) {
						return c;
					}
					c = b.charCodeAt();
					return '\\u00' +
						Math.floor(c / 16).toString(16) +
						(c % 16).toString(16);
				}) + '"';
			}
			return '"' + this + '"';
		};
	})(String.prototype);
}