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(cè)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();