#u_uploadForm { position:absolute; width:450px; height:190px; margin:0; padding:5px; border:10px solid #fff; background:#bbb; }
#u_uploadForm IFRAME { width:100%; height:100%; margin:0; padding:0; border:0; }

#u_uploadBg { position:absolute; margin:0; padding:0; left:0; top:0; width:100%; background:#fff; filter:alpha(opacity=70); -moz-opacity:0.7; opacity:0.7; }