打印js对象

输出JavaScript对象的内部结构常常做调试用.

一个输出所有对象属性的例子如下：
Javascript代码 
function dump_obj(myObject) { 
  var s = ""; 
  for (var property in myObject) { 
   s = s + "\n "+property +": " + myObject[property] ; 
  } 
  alert(s); 
} 


以上代码有些简陋，看个完善些的
Javascript代码 
<script language="javascript"> 
var MAX_DUMP_DEPTH = 10; 
function dumpObj(obj, name, indent, depth) { 
  if (depth > MAX_DUMP_DEPTH) { 
    return indent + name + ": <Maximum Depth Reached>\n"; 
  } 
  if (typeof obj == "object") { 
    var child = null; 
    var output = indent + name + "\n"; 
    indent += "\t"; 
    for (var item in obj) { 
      try { 
        child = obj[item]; 
      } catch (e) { 
        child = "<Unable to Evaluate>"; 
      } 
      if (typeof child == "object") { 
        output += dumpObj(child, item, indent, depth + 1); 
      } else { 
        output += indent + item + ": " + child + "\n"; 
      } 
    } 
    return output; 
  } else { 
    return obj; 
  } 
} 
</script> 



/**
* 对象转json
* @param {Object} obj
*/
this.obj2Str=function(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.sort) {
                        for (var i in o)
                            //r.push("\"" + i + "\":" + this.obj2Str(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(this.obj2Str(o[i]))
                        r = "[" + r.join() + "]";
                    }
                    return r;
                }
                return o.toString().replace(/\"\:/g, '":""');
}


/**
* 打印js的对象
* obj 对象
* name 名称
* indent 缩减
* depth 深度
*/
this.dumpObj=function(obj, name, indent, depth) {
  var MAX_DUMP_DEPTH = 3; 
  if (depth > MAX_DUMP_DEPTH) { 
    return indent + name + ": <Maximum Depth Reached>\n"; 
  } 
  if (typeof obj == "object") { 
    var child = null; 
    var output = indent + name + "\n"; 
    indent += "\t"; 
    for (var item in obj) { 
      try { 
        child = obj[item]; 
      } catch (e) { 
        child = "<Unable to Evaluate>"; 
      } 
      if (typeof child == "object") { 
        output += this.dumpObj(child, item, indent, depth + 1); 
      } else { 
        output += indent + item + ": " + child + "\n"; 
      } 
    } 
    return output; 
  } else { 
    return obj; 
  } 
}