网页上用Javascript控制windows media player重复播放asf文件

Question

JAVASCRIPT函数为
function prelisten(code)
{
var path = code.substring(0, 4) + '/' + code.charAt(4) + '/' + code.substring(5, 8) + '/' + code.charAt(13) + '/asf/';
var url = SERVER_ADDR + path + code + '.asf';
        if(WMPVer.charAt(0) == '9')
{
window.MediaPlayer7.URL = url;
        window.MediaPlayer7.controls.loop=true;
if(MediaPlayer7.error.errorCount != 0)
alert(MediaPlayer7.error.item(0).errorDescription);
else

            
window.MediaPlayer7.controls.play(); }
else
{
window.MediaPlayer6.Filename = url; if(window.MediaPlayer6.ErrorCode != 0)
alert(window.MediaPlayer6.ErrorDescription);
else
window.MediaPlayer6.Play();
}
}