試試這個

一、Object.prototype.getName = function(){

s = this.constructor.toString();

if(s.indexOf("function") == -1){

return null;

}else{

s = s.replace("function","");

var idx = s.indexOf("(");

s = s.substring(0, idx);

s = s.replace(" ", "");

}

return s;

}

//除錯

function MyClass(){}

var x = new MyClass();

var name = x.getName();

alert(name);

2、

Object.prototype.getName = function() {

var funcNameRegex = /function (.{1,})\(/;

var results = (funcNameRegex).exec((this).constructor.toString());

return (results && results.length > 1) ? results[1] : "";

};

3、

function ExampleClass(){

}

ExampleClass.prototype.getName=function(){

for (var a in window){

if (window[a]==this){ alert(a.toString());

};

}

}

window.instance1=new ExampleClass();

instance1.getName();