HTML5 FileApi + FileReader - Feed <object> with SWF

Question

Hello,

I want to use the HTML5 FileApi to read a SWF to an OBJECT (or embed, if it's better to do?).

My current code crashes on Chrome/Iron (the only stable browser which also supports the xmlhttprequest v2 FormData). I got it to read image data into a on-the-fly created IMG. But the object one crashes the current tab in the browser.

else if (file.type == "application/x-shockwave-flash") {
    var show = document.createElement("object");
    show.type = "application/x-shockwave-flash"
    show.style.width = "100%";
    show.style.height = "100%";
    show.id = "thumb";
    document.getElementById("thumbnails").appendChild(show);

    var reader = new FileReader();
    reader.onload = (function (aImg) { 
        return function (e) { aImg.data = e.target.result; }; 
    })(show);
    reader.readAsDataURL(file);

Do I really read to the object.data part? How is it done right? Anybody know? Or is this incomplete and I have to wait for better implementation?