var interval = 15000;
$(document).ready(function()
{
    var now = Date.now(); //get current miliseconds since jan 1970
    window.localStorage.setItem('LastKeepAlive',now); //store it in localstorage so it persists across reloads
    setInterval(logToSystem, interval);
});

function browserCheckForConnectionToAHK() {
    var lastCheck = window.localStorage.getItem('LastKeepAlive'); //bring in the var from localStorage
    var now = Date.now(); //get time in MS
if(now - lastCheck > (interval*2)) { //if the last time we updated was more than 2x the interval, we assume we're disconnected
        alert('Disconnected ' + ((now-lastCheck)/1000) + ' seconds ago from page. Please reload the app');
    } else {
//might want to log this to the system some how so we can identify what they were doing to get disconnected.
    }
    AHK('confirmBrowserConnection'); //Now we'll reach out to AHK and try to confirm we're still connected
}

function ahkStillConnected() { //called by AHK
    var now = Date.now(); //get current time
    window.localStorage.setItem('LastKeepAlive',now); //update our localStorage with this new time, so browserCheckForConnectionToAHK has updated time to compare
    var response = "success"; //we need to return a value to AHK to prevent a sleep loop.
    return response
}


/*********************** AHK **********************************/
confirmBrowserConnection() {
    pageInst:=reconnectToPage() ;connect to the existing instance of chrome page
    response:=pageInst.Evaluate("ahkStillConnected()").value ;eval the func, grab the return value.
    wb.Disconnect() ;disconnect from page - if you don't do this, the script will die.
}

reconnectToPage() {
    pageInst:=Chrome.GetPage(,,,,"event_callBack") ;connect to the first page in Chrome index. As long as yuou have a single page app this should work.
    return pageInst