JS object对象转String字符串方法

function obj2string(o) {
	var r = [];
	if (typeof o == "string") {
		return "\"" + o.replace(/([\'\"\\])/g, "\\$1").replace(/(\n)/g, "\\n").replace(/(\r)/g, "\\r").replace(/(\t)/g, "\\t") + "\"";
	}
	if (typeof o == "object") {
		if (!o.sort) {
			for (var i in o) {
				r.push(i + ":" + obj2string(o[i]));
			}
			if (!!document.all && !/^\n?function\s*toString\(\)\s*\{\n?\s*\[native code\]\n?\s*\}\n?\s*$/.test(o.toString)) {
				r.push("toString:" + o.toString.toString());
			}
			r = "{" + r.join() + "}";
		} else {
			for (var i = 0; i < o.length; i++) {
				r.push(obj2string(o[i]))
			}
			r = "[" + r.join() + "]";
		}
		return r;
	}
	return o.toString();
}