Javascript Autoresize iframe.

js_autoresize_iframe.html

<iframe id="myID" src="THE_URL" width="100%" height="20" frameborder="0"></iframe>

<script>
    function setIframe() {
        $("#dsct").animate({height: $("#dsct").contents().height()+"px"}, 500)
    }

    $("#myID").load(function() {
        setIframe(); // got false height, so we need to execute again after 1 second
        setTimeout(function(){ setIframe() },1000);

        // all the link in the iframe will be targeted to parent window
        $("#myID").contents().find('head').append('<base target="_parent" />');
    });
</script>