html中修改param属性的value的值（视频播放器）

<object  center="center" width="900" height="600" id=&#39;vlc1_IE&#39; events="True" codebase="http://downloads.videolan.org/pub/videolan/vlc/latest/win32/axvlc.cab" classid="clsid:9BE31822-FDAD-461B-AD51-BE1D1C159921">
        <!-- <embed type="application/x-vlc-plugin" pluginspage="http://www.videolan.org" version="VideoLAN.VLCPlugin.2"
            center="center" width="900" height="600"
            id="vlc"> 
        </embed> 
<param name="src" value="rtsp://218.204.223.237:554/live/1/67A7572844E51A64/f68g2mj7wjua3la7.sdp"/>    -->
        <param name="Show
Display
" value="True" />
        <param name="
AutoPlay
" value="true" />
    </object>

function myFunction()
{
var x = 
document
.createElement("param");
x.setAttribute("name","src");
x.setAttribute("value","rtsp://218.204.223.237:554/live/1/67A7572844E51A64/f68g2mj7wjua3la7.sdp");
document.getElementById("vlc1_IE").appendChild(x);
}

<input type="button" style="width:26px; height:24px; background-image:url(&#39;./icon/0.png&#39;);" onclick="myFunction()" value="Bt">