asp中插入wmv视频如何置于网页底层？现在遮挡视频网页菜单

<style type="text/css">
#Layer{
    z-index:-1;
    }
</style>



<div id ="Laryer">
<OBJECT ID="MediaPlayer" WIDTH="640" HEIGHT="480" CLASSID="CLSID:22D6F312-B0F6-11D0-94AB-0080C74C7E95" STANDBY="Loading Windows Media Player components..." TYPE="application/x-oleobject"> 
<PARAM NAME="FileName" VALUE= <%=path%>> 
<PARAM name="ShowControls" VALUE="true"> 
<param name="ShowStatusBar" value="true"> 
<PARAM name="ShowDisplay" VALUE="false"> 
<PARAM name="autostart" VALUE="false"> 
<EMBED TYPE="application/x-mplayer2" SRC= <%=path%> WIDTH="640" HEIGHT="480" ShowControls="1" ShowStatusBar="0" ShowDisplay="0" autostart="0"> </EMBED> 
</OBJECT>
</div>