Javascript让媒体通过指定的按钮播放

因为windows特定的mediaplayer的媒体代码只支持在IE里使用，所以以下代码不支持FF。功能实现通过外部按钮来控制媒体播放。

!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd"
html
head
meta http-equiv="Content-Type" content="text/html; charset=gb2312"
title无标题文档/title
/head

body
object classid=clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95 codebase="http://activex.microsoft.com/activex/controls/mplayer
/en/nsmp2inf.cab#Version=6,1,5,217"
id=MediaPlayer type=application/x-oleobject width=210 height=240 standby="Loading Microsoft Windows Media Player components..." VIEWASTEXT align=MIDDLE
param name=AudioStream value=-1
param name=AutoSize value=0
param name=AutoStart value=0
param name=AnimationAtStart value=0
param name=AllowScan value=-1
param name=AllowChangeDisplaySize value=0
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=0
param name=CursorType value=32512
param name=CurrentPosition value=-1
param name=CurrentMarker value=0
param name=DefaultFrame value=1
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=0
param name=EnableFullScreenControls value=0
param name=EnableTracker value=1
param name=Filename value="http://www.webjx.com/music/sejie/000025.mp3"
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=0
param name=SelectionEnd value=true
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=1
param name=ShowGotoBar value=1
param name=ShowPositionControls value=1
param name=ShowStatusBar 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=-1070
param name=WindowlessVideo value=1
/objectbr
script type="text/javascript"
function play(){
document.getElementById("MediaPlayer").play();
}
/script
input type="button" value="播放" onClick="play()"
/body
/html