function resizeIframe() {
    document.getElementById('iframe').style.height = "415px";
    var height = document.getElementById('iframe').contentWindow.document.body.scrollHeight;      
    if(height<415) height=415;
    document.getElementById('iframe').style.height = height +"px";
    document.getElementById('myTable').style.height = height + "px";
    };
document.getElementById('iframe').onload = resizeIframe;
window.onresize = resizeIframe;