function resizeiframe() {
    var height = document.documentElement.clientHeight;
    height -= document.getElementById('blog-iframe').offsetTop;
    document.getElementById('blog-iframe').style.height = (height - 8) + "px";
};

$(function() {
    $('#blog-iframe').load(function() { resizeiframe(); });
    $(window).resize(function() { resizeiframe(); });
});