var Interface = function(name,methods){ 
 if(arguments.length != 2){ 
  throw new Error("Interface constructor called with" + arguments.length + "arguments, but expected exactly 2."); 
 } 
 this.name = name; 
 this.methods = []; 
 for(var i = 0,len = methods.length; i <len; i++){ 
  if(typeof methods[i] !== 'string'){ 
   throw new Error("接口方法的名稱必須是一個(gè)字符串"); 
  } 
  this.methods.push(methods[i]); 
 } 
}; 
//Static class Method 
Interface.ensureImplements = function(myobject1,Iobject1){ 
 if(arguments.length!=2){ 
  throw new Error("方法 Interface.ensureImplemnents 指定了" + arguments.length+ "個(gè)參數(shù)，但是期望的是2個(gè) ."); 
 } 
 for(var i=1,len = arguments.length; i<len; i++){ 
  var _interface = arguments[i]; 
  //接口對(duì)象，要通過接口類實(shí)例出來
  if(_interface.constructor !== Interface){ 
   throw new Error("接口，不是通過Interface類，實(shí)例出來的"); 
  } 
  //把接口對(duì)象里面的方法名取出來，結(jié)合到本例中的手機(jī)對(duì)象，來驗(yàn)證，該手機(jī)對(duì)象是否有這兩個(gè)方法，且方法名是不是一樣；
  for(var j=0, methodsLen = _interface.methods.length; j<methodsLen;j++ ){ 
   var method = _interface.methods[j]; 
   if(!myobject1[method]||typeof myobject1[method] !== 'function'){ 
    throw new Error("通過驗(yàn)證函數(shù)：Interface.ensureImplements: "+myobject1.name+"對(duì)象的方法"+ method + " 找不到或者不是一個(gè)Function"); 
   } 
  } 
 } 
};

//通過接口類，實(shí)例出一個(gè)"拔通電話"的接口；現(xiàn)在這個(gè)接口對(duì)象testInterface，規(guī)定了二個(gè)方法，且方法名字是"callfun"和"callnum"
var testInterface = new Interface("call",["callfun","callnum"]);
//移動(dòng)電話類，的構(gòu)造函數(shù)；
var mobilepone = function(call){ 
 this.name = call;
}
//移動(dòng)電話類的公有方法
mobilepone.prototype = {
 "constructor":mobilepone,
 //必須和前面接口對(duì)象規(guī)定的方法名一樣；
 "callfun" : function(){
  document.write("按鍵");
 },
 //必須和前面接口對(duì)象規(guī)定的方法名一樣
 "callnum" : function(){
  document.write("拔號(hào)");
 }
}
//通過移動(dòng)電話類，實(shí)例一個(gè)三星的手機(jī)對(duì)象
var anycall = new mobilepone("anycall");
//檢測這個(gè)個(gè)三星的手機(jī)對(duì)象，是否實(shí)現(xiàn)了[拔通電話]這個(gè)接口;即把三星手機(jī)對(duì)象和接口對(duì)象做為參數(shù)傳入驗(yàn)證函數(shù)，進(jìn)行比較
Interface.ensureImplements(anycall,testInterface);
anycall.callnum();