javascript - 如何防止在页面加载时执行JavaScript函数？

Question

我有一个本地网页来管理路由器上的ssh隧道，我正在尝试对ssh隧道发出实时声音通知。连接/断开连接时，它会播放声音。到目前为止，它运行良好，但问题是，每次加载网页时，它都会播放声音，而我只希望当ssh连接或断开连接时才播放声音，而我不希望在ssh连接时播放声音即使符合条件(已连接/已断开连接)，我也会加载页面。这是我的脚本:

var count = 0; // variable to prevent my function to play sound every second
function sshNotification() {
    $.ajaxSetup({ cache: false });
    $.ajax({
        type:"get",
        url:"cgi-bin/check", // CGI script to check whether my ssh is connected / disconnected
        success:function(data) {
            if (data.indexOf("192.168.1.1:1080")>-1) {
                if (count == 0) {
                    var audio = new Audio("on.ogg"); // Play a sound when it's connected
                    audio.play();
                    count = 1;
                };
            }
            else {
                if (count == 1) {
                    var audio = new Audio("off.ogg"); // Play a sound when it's disconnected
                    audio.play();
                    count = 0;
                };
            } 
            setTimeout(sshNotification, 1000);
        }
    });
};
sshNotification();

连接ssh时，CGI输出如下所示:

192.168.1.1:1080

当我的ssh断开连接时，它什么也不输出。
如何在不加载页面的情况下播放声音通知，而仅在连接或断开ssh时播放声音通知。抱歉，如果您认为我的解释有点令人困惑，请随时询问您不了解的部分。谢谢。

Answer 1

因此，如果只想检测状态变化:

var count = 0; // variable to prevent my function to play sound every second
var lastState;
function sshNotification() {
    $.ajaxSetup({ cache: false });
    $.ajax({
        type:"get",
        url:"cgi-bin/check", // CGI script to check whether my ssh is connected / disconnected
        success:function(data) {
            if (data.indexOf("192.168.1.1:1080")>-1) {
                if (count == 0) {
                    if(lastState !== 'connected') {
                        var audio = new Audio("on.ogg"); // Play a sound when it's connected
                        audio.play();
                        count = 1;                          
                    }
                    lastState = 'connected';
                };
            }
            else {
                if (count == 1) {
                    if(lastState !== 'not_connected') {
                        var audio = new Audio("off.ogg"); // Play a sound when it's disconnected
                        audio.play();
                        count = 0;                      
                    }
                    lastState = 'not_connected';
                };
            } 
            setTimeout(sshNotification, 1000);
        }
    });
};
sshNotification();