求解关于websoket的问题

server.js代码如下 var ws=require('websocket-server');

var server=ws.createServer(); server.addListener('connection',function(connection){ console.log('connected...');

connection.addListener('message',function(msg){
console.log(msg);

});

});

server.listen(888); console.log('server start..');

client.html代码如下

ws.onopen=function(){

document.write('hello'); } ws.onclose=function(){

document.write('close'); }