//头部广告
var top1="<a href=http://www.sony.com.cn/products/blu-ray/index.htm target=_blank><img src=http://www.audio160.com/image/ad/sony-550x74.gif width=550 height=74 border=0></a>";
var top2="<a href=http://www.hivi.com target=_blank><img src=http://www.audio160.com/image/ad/hivi-188x74.gif width=188 height=74 border=0></a>";
//顶部通栏
var top3="";
var top4="<a href=http://www.avlight.com.cn target=_blank><img src=http://www.audio160.com/image/ad/avlight-712x70.gif width=712 height=70 border=0></a>";

//中间通栏
var top5="<a href=http://www.gdbbk.com target=_blank><img src=http://www.audio160.com/image/ad/bubugao-188x70.gif width=188 height=70 border=0></a>";
var top6="";