js控制WindowsMediaPlayer的问题

Question

 <script  language="javascript">  
var  state;  
var  varb;  
var  varfullscreen=0;  
function  loop()  
{  
           WindowsMediaPlayer.playCount=2;  
           
}  
 function  playerinit()  
{  
           WindowsMediaPlayer.url="<%=VideoFile %>";            //定义你自己的文件  
           WindowsMediaPlayer.settings.autoStart  =  false  ;  }  
 
function  play()  
{  
        playerinit();
            
           if  (WindowsMediaPlayer.controls.isavailable("play"))  
           {  
                       WindowsMediaPlayer.controls.play();  
                       state=setInterval("updatetime()",1000);  
                       playerinfo.innerHTML  =  "播放"  
                       varfullscreen=1;  
                       playerinfo2.innerHTML  =  '音量:'+WindowsMediaPlayer.settings.volume;  
           }  
}  
 
function  voldown()  
{  
           if  (  WindowsMediaPlayer.settings.volume  <  5  )  
           {  
                       WindowsMediaPlayer.settings.volume  =  0;  
                       playerinfo2.innerHTML  =  "音量:0";  
                       playerinfo1.innerHTML  =  '沉默中  ';  
           }  
           else  
           {  
                       WindowsMediaPlayer.settings.volume  -=  5;  
                       playerinfo2.innerHTML  =  '音量:'+WindowsMediaPlayer.settings.volume;  
                       playerinfo1.innerHTML  =  "非静音";  
           }  
}  
 
function  volup()  
{  
           if  (  WindowsMediaPlayer.settings.volume  >  95  )  
           {  
                       WindowsMediaPlayer.settings.volume  =  100;  
                       playerinfo2.innerHTML  =  "音量:100";  
                       playerinfo1.innerHTML  =  '最大音  ';  
           }  
           else  
           {  
                       WindowsMediaPlayer.settings.volume  +=  5;  
                       playerinfo2.innerHTML  =  '音量:'+WindowsMediaPlayer.settings.volume;  
                       playerinfo1.innerHTML  =  '非静音  ';  
           }  
}  
 
function  pause()  
{  
           if  (WindowsMediaPlayer.controls.isavailable("pause"))  
           {  
                       WindowsMediaPlayer.controls.pause();  
                       clearInterval(state);  
                       playerinfo.innerHTML  =  "暂停";  
                       varfullscreen=1;  
           }  
}  
 
function  stop()  
{  
           if  (WindowsMediaPlayer.controls.isavailable("stop"))  
           {  
                       WindowsMediaPlayer.controls.stop();  
                       clearInterval(state);  
                       playerinfo.innerHTML  =  "停止"  
                       varfullscreen=0;  
           }  
}  
 
function  mute()  
{  
           WindowsMediaPlayer.settings.mute  =  !WindowsMediaPlayer.settings.mute;  
           if(varb!=1)  
           {  
                       playerinfo1.innerHTML  =  '静音中  ';  
                       document.all.volup.disabled=true;  
                       document.all.voldown.disabled=true;  
                       document.all.balance.disabled=true;  
                       varb=1;  
           }  
           else  
           {  
                       playerinfo1.innerHTML  =  '非静音  ';  
                       document.all.volup.disabled=false;  
                       document.all.voldown.disabled=false;  
                       document.all.balance.disabled=false;  
                       varb=0;  
           }  
}  
function  balance()  
{  
           switch  (WindowsMediaPlayer.settings.balance)  
           {  
           case  0:  
                       WindowsMediaPlayer.settings.balance  =  100;  
                       playerinfo1.innerHTML  =  '左声道  ';  
                       break;  
           case  100:  
                       WindowsMediaPlayer.settings.balance  =  -100;  
                       playerinfo1.innerHTML  =  '右声道  ';  
                       break;  
           case  -100:  
                       WindowsMediaPlayer.settings.balance  =  0;  
                       playerinfo1.innerHTML  =  '全声道  ';  
                       break;  
           default  :  
                       WindowsMediaPlayer.settings.balance  =  0;  
                       playerinfo1.innerHTML  =  '全声道  ';  
                       break;  
           }  
}   
function  fullScreen()  
{  
           if(varfullscreen)  
                       WindowsMediaPlayer.fullScreen='true';  
           else  
                       WindowsMediaPlayer.fullScreen='0';  
}  
function  updatetime()  
{  
           if(WindowsMediaPlayer.controls.currentPositionString=='')  
                       {  
                                   playerinfo.innerHTML  =  "00:00"  +  "  /  "  +  WindowsMediaPlayer.currentMedia.durationString;  
                                   varfullscreen=0;  
                       }  
           else  
                       playerinfo.innerHTML  =  WindowsMediaPlayer.controls.currentPositionString  +  "  /  "  +  WindowsMediaPlayer.currentMedia.durationString;  
}  
</script>  
<script  language  =  "JavaScript"    for=WindowsMediaPlayer  event=playstatechange(newstate)>  
switch  (newstate)  
{  
           case  1:  
                       playerinfo.innerHTML  =  "停止";  
                       break;  
           case  2:  
                       playerinfo.innerHTML  =  "暂停";  
                       break;  
           case  3:  
                       playerinfo.innerHTML  =  "正在播放";  
                       break;  
           case  4:  
                       playerinfo.innerHTML  =  "4";  
                       break;  
           case  5:  
                       playerinfo.innerHTML  =  "5";  
                       break;  
           case  6:  
                       playerinfo.innerHTML  =  "正在缓冲...";  
                       break;  
           case  7:  
                       playerinfo.innerHTML  =  "7";  
                       break;  
           case  8:  
                       playerinfo.innerHTML  =  "8";  
                       break;  
           case  9:  
                       playerinfo.innerHTML  =  "正在连接...";  
                       break;  
           case  10:  
                       playerinfo.innerHTML  =  "准备就绪";  
                       break;  
           case  11:  
                       playerinfo.innerHTML  =  "11";  
                       break;  
           default:  
                       playerinfo.innerHTML  =  "";  
}  
</script> 
这代码如果只是放在 html 文件里是可以正常使用的，可是放到asp.net 里面就不能正常使用出错了。 
错误提示对像不支持此属性和方法！ 各位帮我看看啊！这是什么原因是啊！