【JS】JSON转换成字符串，兼容低级浏览器

transJson2str.js

function $transJson2str(o) {
    if (o == undefined) {
        return "";
}
    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.nodeName){
            r.push(["document node", "nodeName:"+o.nodeName, "id:"+o.id, "class:"+o.className].join('-'));
            r = "{" + r.join() + "}";
        }
        else if (!o.sort) {
            for (var i in o)
                r.push("\"" + i + "\":" + $transJson2str(o[i]));
            if (!!document.all && !/^\n?function\s*toString\(\)\s*\{\n?\s*\[native code\]\n?\s*\}\n?\s*$/.test(o.toString)) {
                r.push("toString:" + o.toString.toString());
}
            r = "{" + r.join() + "}";
} else {
            for (var i = 0;
 i < o.length;
 i++)
                r.push($transJson2str(o[i]));
            r = "[" + r.join() + "]";
}
        return r;
}
    return o.toString().replace(/\"\:/g, '":""');
}

var obj = {"a":"abc"},
    str;
str = $transJson2str(obj);