js添加背景音乐示例

<script language="javascript">
<!--
var sound1="song1.mid"
var sound2="song2.mid"
var sound3="song3.mid"
var sound4="song4.mid"
var sound5="song5.mid"
var sound6="song6.mid"
var sound7="song7.mid"
var sound8="song8.mid"
var sound9="song9.mid"
var sound10="song10.mid"
var x=math.round(math.random()*9)
if (x==0) x=sound1
else if (x==1) x=sound2
else if (x==2) x=sound3
else if (x==3) x=sound4
else if (x==4) x=sound5
else if (x==5) x=sound6
else if (x==6) x=sound7
else if (x==7) x=sound8
else if (x==8) x=sound9
else x=sound10
//添加背景音乐代码
if (navigator.appname=="microsoft internet explorer")
document.write('<bgsound src='+'"'+x+'"'+' loop="infinite">')
else
document.write('<embed src='+'"'+x+'"'+'hidden="true" border="0" width="20" height="20" autostart="true" loop="true">')
//-->
</script>