function StringBuffer() {
	this.buffer = [];
}

StringBuffer.prototype.append = function append(string) {
	this.buffer.push(string);
	return this;
};

StringBuffer.prototype.toString = function toString() {
	return this.buffer.join('');
};

/* example */
/*
var buf = new StringBuffer();

buf.append("hello");
buf.append("world");

alert(buf.toString());
*/