我在网页中加了个视频插件，却无法实现拖动，请各位高手用javascript解决！急！！

<script  language="javascript">  
function  process(psize)  
{    
 window.MediaPlayer1.DisplaySize  =  psize;  
 window.MediaPlayer1.play();  
}  
</script>  
<SCRIPT LANGUAGE="JavaScript">
<!--
var over=false;
var down=false;
var divleft,divtop;
function move()
{
if(down)
{
moonpiazza.style.left = event.clientX-divleft;
moonpiazza.style.top = event.clientY-divtop;
}
}
function moveDown()
{
down=true;
divleft = event.clientX-parseInt(moonpiazza.style.left);
divtop = event.clientY-parseInt(moonpiazza.style.top);
}
//-->
</SCRIPT>
</head>  
<BODY bgColor=#ffffff leftMargin=0 topMargin=0 onmousemove="move()">
<div style="position:absolute;cursor:move;z-index:1;width:1;height:1; left: 100; top:100" ID=moonpiazza onmousedown="moveDown()" onmouseup="down=false"> 
   <OBJECT  id="MediaPlayer1"  classid="clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95">
       <param  name="AudioStream"  value="-1">  
       <param  name="AutoSize"  value="-1">  
       <param  name="AutoStart"  value="1">  
       <param  name="AnimationAtStart"  value="-1">  
       <param  name="AllowScan"  value="-1">  
       <param  name="AllowChangeDisplaySize"  value="-1">  
       <param  name="AutoRewind"  value="0">  
       <param  name="Balance"  value="0">  
       <param  name="BaseURL"  value>  
       <param  name="BufferingTime"  value="5">  
       <param  name="CaptioningID"  value>  
       <param  name="ClickToPlay"  value="-1">  
       <param  name="CursorType"  value="0">  
       <param  name="CurrentPosition"  value="-1">  
       <param  name="CurrentMarker"  value="0">  
       <param  name="DefaultFrame"  value>  
       <param  name="DisplayBackColor"  value="0">  
       <param  name="DisplayForeColor"  value="16777215">  
       <param  name="DisplayMode"  value="0">  
       <param  name="DisplaySize"  value="0">  
       <param  name="Enabled"  value="-1">  
       <param  name="EnableContextMenu"  value="-1">  
       <param  name="EnablePositionControls"  value="-1">  
       <param  name="EnableFullScreenControls"  value="0">  
       <param  name="EnableTracker"  value="-1">  
       <param  name="Filename"  value="d:\daima\haoren.wmv">  
       <param  name="InvokeURLs"  value="-1">  
       <param  name="Language"  value="-1">  
       <param  name="Mute"  value="0">  
       <param  name="PlayCount"  value="1">  
       <param  name="PreviewMode"  value="0">  
       <param  name="Rate"  value="1">  
       <param  name="SAMILang"  value>  
       <param  name="SAMIstyle"  value>  
       <param  name="SAMIFileName"  value>  
       <param  name="SelectionStart"  value="-1">  
       <param  name="SelectionEnd"  value="-1">  
       <param  name="SendOpenStateChangeEvents"  value="-1">  
       <param  name="SendWarningEvents"  value="-1">  
       <param  name="SendErrorEvents"  value="-1">  
       <param  name="SendKeyboardEvents"  value="0">  
       <param  name="SendMouseClickEvents"  value="0">  
       <param  name="SendMouseMoveEvents"  value="0">  
       <param  name="SendPlayStateChangeEvents"  value="-1">  
       <param  name="ShowCaptioning"  value="0">  
       <param  name="ShowControls"  value="-1">  
       <param  name="ShowAudioControls"  value="-1">  
       <param  name="ShowDisplay"  value="0">  
       <param  name="ShowGotoBar"  value="1">  
       <param  name="ShowPositionControls"  value="0">  
       <param  name="ShowStatusBar"  value="0">  
       <param  name="ShowControls"  value="1">  
       <param  name="ShowTracker"  value="1">  
       <param  name="TransparentAtStart"  value="0">  
       <param  name="VideoBorderWidth"  value="0">  
       <param  name="VideoBorderColor"  value="0">  
       <param  name="VideoBorder3D"  value="0">  
       <param  name="Volume"  value="-600">  
       <param  name="WindowlessVideo"  value="0">
   </OBJECT>
<a  href="javascript:process(0)"><img  src="d:\daima\color03.gif"  alt="复原"  width="10"  height="10"  border="0"></a>
<a  href="javascript:process(5)"><img  src="d:\daima\color02.gif"  alt="1/2倍"  width="10"  height="10"  border="0"></a>
<a  href="javascript:process(7)"><img  src="d:\daima\color05.gif"  alt="2倍"  width="10"  height="10"  border="0"  ></a>
<a  href="javascript:process(3)"><img  src="d:\daima\color01.gif"  alt="全屏"  width="10"  height="10"  border="0"></a>
</div>
</br><p>&nbsp;</p>