js实现类似php中的var_dump()

1. [代码][JavaScript]代码    

function var_dump(obj) {
    if(typeof(obj) == "object") {
        var txt = '';
        for(key in obj)
        {
            txt += key + '=' + obj[key] + ',';
        }
        return "Type: "+typeof(obj)+((obj.constructor) ? "\nConstructor: "+obj.constructor : "")+"\nValue: " + txt;
    } else {
        return "Type: "+typeof(obj)+"\nValue: "+obj;
    }
}