Attempt #2 pa511cams

<html>
<head>
<script>
var myCamTimer, myCamTimeout, dial1;
function refreshCamera() {
    var b = new Date;
    var addr = "https://pa511cams.ilchost.com/cameras/d6/CAM-06-470.jpg?nocache="
    a = document.getElementById("myCam");

    var xhr = new XMLHttpRequest();
    xhr.responseType = 'blob'; //so you can access the response like a normal URL
    xhr.onreadystatechange = function () {
        if (xhr.readyState == XMLHttpRequest.DONE && xhr.status == 200) {
            a.src = URL.createObjectURL(xhr.response); //create <img> with src set to the blob
        }
    };
    xhr.open('GET', addr + b.getTime(), true);
    xhr.setRequestHeader('Referer', 'https://www.511pa.com/CameraListing.aspx');
    xhr.send();
    //a.src = a.src.substring(0, a.src.indexOf("nocache=")) + "nocache=" + b.getTime()
}
function startCamRefresh() {
    clearInterval(myCamTimer);
    clearTimeout(myCamTimeout);
    myCamTimer = setInterval(function() {
        refreshCamera()
    }, 5e3);
    myCamTimeout = setTimeout(function() {
        stopCamRefresh()
    }, 65e3);
    try {
        document.getElementById("camRefLink").style.visibility = "hidden";
    } catch (a) {}
}
function stopCamRefresh() {
    clearInterval(myCamTimer);
    clearTimeout(myCamTimeout);
    try {
        document.getElementById("camRefLink").style.visibility = "visible";
    } catch (a) {}
}
</script>
</head>
<body onload=startCamRefresh()>

<img id="myCam" style="height:240px;width:352px;"
     title="cam image - US 1 NB at Old Lincoln Highway"
     src="https://pa511cams.ilchost.com/cameras/d6/CAM-06-470.jpg?nocache=1539188740869">
<div id="camRefLink" style="visibility:hidden">Stream Timed Out</div>
</body>
</html>