test.html

<!DOCTYPE html>
<html lang="zh">

<head>
    <meta charset="UTF-8">
    <title>ThingJS的 Iframe演示</title>

</head>

<body>

<div width="800px">
    <button style="position: absolute;top: 15px;left: 15px;width: 75px;" onclick="flyToCar()">飞到小车</button>
    <button style="position: absolute;top: 45px;left: 15px;width: 75px;"
            onclick="flyToBack()">返&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;回</button>
    <iframe id="testMsg" style="width: 600px;height: 400px;"
            src='https://www.thingjs.com/s/aa25e09eae2f73e6ce080d73?params=105b0f77fd24654d4eebc434e9'></iframe>

</div>
<script>
    function flyToCar() {
        var a = document.getElementById("testMsg");
        var msg = {
            funcName: 'test'
        }
        a.contentWindow.postMessage(msg, "*");
    }

    function flyToBack() {
        var a = document.getElementById("testMsg");
        var msg = {
            funcName: 'test2',
            param: "2"
        }
        a.contentWindow.postMessage(msg, "*");
    }
</script>
</body>

</html>