how to check if a same domain, dynamically loaded iframe which i have no control over is 100% loaded?
function callIframe(url, callback) {
    $(document.body).append('<IFRAME id="myId" ...>');
    $('iframe#myId').attr('src', url);

    $('iframe#myId').load(function()
    {
        callback(this);
    });
}

$(".post_relative").each(function () {
        var post_relative = $(this);
        var photoset = post_relative.find('.html_photoset');
        if(photoset.length){
            var myFrame = photoset.find("iframe");
            myFrame.load(function(){
                var newCover=myFrame.contents().find('.photoset').children(':first-child').children(':first-child').attr("href")+ '?'+(Math.random()*10000);
                post_relative.append("<img src='"+ newCover +"' alt='Cover Page' />");
                var psHeight = post_relative.find('img');
                psHeight.load(function(){
                if (psHeight.height()>heightRef){
                    psHeight.height(heightRef);
            }
                myFrame.hide();
            })
        })
        }
    });

$("#iFrameId").load(function (){
    // do something once the iframe is loaded
});