為了不讓ajax一直發請求，為了節約資源，用了WebSocket，來做一下筆記：
//WebSocket長連接
var webSocket = new WebSocket("ws://"+ ip +":8080");
webSocket.onopen = function(event) {
console.log("Connect open!");
webSocket.send('hello');
webSocket.onmessage = function(event) {
//處理代碼
webSocket.close();
}
};
};
webSocket.onerror = function(event) {
alert(event.data);
};
webSocket.onclose = function(event) {
console.log("Connect close!");
};
