window.onload = function() {
    var newHeight = document.getElementById('frmContenedor').contentWindow.document.body.scrollHeight;
    document.getElementById('frmContenedor').style.height = newHeight + 10 + "px";
}



/*


window.onload = function() {
    if (document.getElementById('frmContenedor') != null) {
        resizeIframe('frmContenedor', 'frmContenedor');
        addEvent(document.getElementById('frmContenedor'), 'load', function() { resizeIframe('frmContenedor', 'frmContenedor'); }, false);
    }
}

function addEvent(obj, evType, fn, useCapture) {

    if (obj.addEventListener) {
        obj.addEventListener(evType, fn, useCapture);

    } else if (obj.attachEvent) {
        obj.attachEvent("on" + evType, fn);

    } else {
        obj['on' + evType] = fn;
    }
}

function resizeIframe(ID, NOMBRE) {
    document.getElementById(ID).height = null;
    document.getElementById(ID).width = null;
    window.location = '#'; //necesario para safari 
    var m = getWindowData(NOMBRE, ID);
    document.getElementById(ID).height = m[5];
    document.getElementById(ID).width = m[4] + 22;
}

function getWindowData(n, i) {
    var ifr = document.getElementById(i).contentWindow.document || document.getElementById(i).contentDocument;
    var widthViewport, heightViewport, xScroll, yScroll, widthTotal, heightTotal;
    if (typeof window.frames[n].innerWidth != 'undefined') {
        widthViewport = window.frames[n].innerWidth;
        heightViewport = window.frames[n].innerHeight;
    } else if (typeof ifr.documentElement != 'undefined' && typeof ifr.documentElement.clientWidth != 'undefined' && ifr.documentElement.clientWidth != 0) {
        widthViewport = ifr.documentElement.clientWidth;
        heightViewport = ifr.documentElement.clientHeight;
    } else {
        widthViewport = ifr.getElementsByTagName('body')[0].clientWidth;
        heightViewport = ifr.getElementsByTagName('body')[0].clientHeight;
    }
    xScroll = window.frames[n].pageXOffset || (ifr.documentElement.scrollLeft + ifr.body.scrollLeft);
    yScroll = window.frames[n].pageYOffset || (ifr.documentElement.scrollTop + ifr.body.scrollTop);
    widthTotal = Math.max(ifr.documentElement.scrollWidth, ifr.body.scrollWidth, widthViewport);
    heightTotal = Math.max(ifr.documentElement.scrollHeight, ifr.body.scrollHeight, heightViewport);
    return [widthViewport, heightViewport, xScroll, yScroll, widthTotal, heightTotal];
}

*/