// Douglas crockford's "remedial" code, from http://javascript.crockford.com/remedial.html
// presumably (c) to him; Couldn't find (c) notice on his website
// This adds some important missing functions.

function typeOf(value) {
	var s = typeof value;
	if (s === 'object') {
		if (value) {
			if (typeof value.length === 'number' &&
					!value.propertyIsEnumerable('length') &&
					typeof value.splice === 'function') {
				s = 'array';
			}
		} else {
			s = 'null';
		}
	}
	return s;
}

function isEmpty(o) {
	var i, v;
	if (typeOf(o) === 'object') {
		for (i in o) {
			v = o[i];
			if (v !== undefined && typeOf(v) !== 'function') {
				return false;
			}
		}
	}
	return true;
}

String.prototype.entityify = function () {
	return this.replace(/&/g, "&amp;").replace(/</g,
		"&lt;").replace(/>/g, "&gt;");
};

String.prototype.quote = function () {
	var c, i, l = this.length, o = '"';
	for (i = 0; i < l; i += 1) {
		c = this.charAt(i);
		if (c >= ' ') {
			if (c === '\\' || c === '"') {
				o += '\\';
			}
			o += c;
		} else {
			switch (c) {
			case '\b':
				o += '\\b';
				break;
			case '\f':
				o += '\\f';
				break;
			case '\n':
				o += '\\n';
				break;
			case '\r':
				o += '\\r';
				break;
			case '\t':
				o += '\\t';
				break;
			default:
				c = c.charCodeAt();
				o += '\\u00' + Math.floor(c / 16).toString(16) +
					(c % 16).toString(16);
			}
		}
	}
	return o + '"';
};

String.prototype.supplant = function (o) {
	return this.replace(/{([^{}]*)}/g,
		function (a, b) {
			var r = o[b];
			return typeof r === 'string' || typeof r === 'number' ? r : a;
		}
	);
};

String.prototype.trim = function () {
	return this.replace(/^\s+|\s+$/g, "");
};