$(window).load(function() {
    resizeOuterIFrame();
});

function resizeOuterIFrame()
{
    var protoHost = (("https:" == document.location.protocol) ? "https://"  : "http://");
	var domainHost = "www.t-mobile.nl"; //"localhost/PublicWeb_Main";
    var grandChildHtml = '' +
    '<div style="display: none;">' +
    '<iframe id="grandChildFrame" marginwidth="0" marginheight="0" frameborder="0" src="' + protoHost + domainHost + '/Code/WebPortals/Platform/PublicWeb/Framework/UI/IframeComponent/GrandChildPage.aspx?iframeHeight=' +
        $(document.body).height() +
    '"></iframe>' +
    '</div>';
    $(document.body).append(grandChildHtml);
}