]<script>
function set_mnu()
{
if (mnu.style.visibility=="hidden")
{
//产生效果和把图层显示
mnu.filters.revealTrans.apply();
mnu.style.visibility="visible";
mnu.filters.revealTrans.play();
}
else{
//隐藏图层和停止效果播放
mnu.filters.revealTrans.stop();
mnu.style.visibility="hidden" ;
}
}
</script>
