function ad_pic(a,s,w,h){
document.write ("<a href="+a+ " target=_blank><img src="+s+" border=0 width="+w+" height="+h+"></a>");
	 }
document.write("<table width='98%' height='23' border='0' cellpadding='0' cellspacing='0' background='images/0715_topbg.gif'>");
document.write("  <tr> ");
document.write("      <td width='10' ><a href='../index.htm' target='_top'><img src='../itimg2/logo_it.gif' width='72' height='23' border='0'></a></td>");
document.write("      <td nowrap style='line-height:23px'>");
document.write("      <A href=../index.htm target=_top>首页</A> | <A href=../pro/av1.htm target=_top>专业音响</A> | <A href=../pro/av2.htm target=_top>舞台灯光</A> ");
document.write("      | <A href=../pro/av3.htm target=_top>投影设备</A> | <A href=../pro/av4.htm target=_top>广播会议</A> ");
document.write("      | <A href=../123/index.htm target=_top>期刊服务</A> | <A href=../so/ target=_top>搜索风暴</A> ");
document.write("      | <A href=http://bbs.av35.cn target=_top>音响论坛</A> | <A href=../zixun/liuyan.htm target=_top>在线留言</A> ");
if(screen.width > 800){
document.write(' | <A href=../help/aboutus.htm target=_top>关于我们</A> | <A href=../help/huiyuan3.htm target=_top>帮助文档</A>  ');
}
document.write("</td>");
document.write("  </tr><tr><td height=1 bgcolor=#ffffff colspan=2></td></tr>");
document.write("</table>");