var w = 1000;
var h = 600;
var z = document.getElementsByTagName("object");
for ( i in z ) {
    var x = z[i];
    x.style.width = w + "px";
    x.style.height = h + "px";
    break;
}
var y = document.createElement("div");
y.style.position = "absolute";
y.style.width = w + "px";
y.style.height = (h+20) + "px";
y.style.zIndex = 100;
y.style.top = "60px";
y.style.left = "50%";
y.style.marginLeft = w/2*-1 + "px";
y.appendChild(x);
document.body.appendChild(y);