var how_many_ads = 10;
var now = new Date();
var sec = now.getSeconds();
var num = sec % how_many_ads;
var ad_content=new Array(); 

ad_content[0] =' <a href=http://list.6park.com/parks/out.php?perm=wofa300250 target=_blank><img style=\"FLOAT: left\" hspace=5 vspace=1 align=top src=http://am.6park.com/img/wofa/300250.gif width=300 height=250 border=0></a> '

ad_content[1] =' <a href=http://list.6park.com/parks/out.php?perm=wofa300250 target=_blank><img style=\"FLOAT: left\" hspace=5 vspace=1 align=top src=http://am.6park.com/img/wofa/300250.gif width=300 height=250 border=0></a> '

ad_content[2] =' <a href=http://list.6park.com/parks/out.php?perm=liyi99 target=_blank><img style=\"FLOAT: left\" hspace=5 vspace=1 align=top src=http://img.6park.com/img/liyi99/300250.jpg width=300 height=250 border=0></a> '

ad_content[3] =' <a href=http://list.6park.com/parks/out.php?perm=nf300 target=_blank><img style="FLOAT: left" hspace=5 vspace=1 align=top src=http://img.6park.com/img/forex/forex300.gif width=300 height=250 border=0></a> '

ad_content[4] =' <a href=http://list.6park.com/parks/out.php?perm=dailyvita.com target=_blank><img style=\"FLOAT: left\" hspace=5 vspace=1 align=top src=http://img.6park.com/img/uu300.gif width=300 height=250 border=0></a> '

ad_content[5] =' <a href=http://list.6park.com/parks/out.php?perm=vodgo.com target=_blank><img style=\"FLOAT: left\" hspace=5 vspace=1 align=top src=http://am.6park.com/img/vodgo/vodgo300.jpg width=300 height=250 border=0></a> '

ad_content[6] =' <IFRAME ID=news300 FRAMEBORDER=NO SCROLLING=NO style=\"FLOAT: left\" SRC=http://list.6park.com/local.php?which=news300&adnum=no1 width=300 height=250></IFRAME> '
ad_content[7] =' <IFRAME ID=news300 FRAMEBORDER=NO SCROLLING=NO style=\"FLOAT: left\" SRC=http://list.6park.com/local.php?which=news300&adnum=no2 width=300 height=250></IFRAME> '
ad_content[8] =' <IFRAME ID=news300 FRAMEBORDER=NO SCROLLING=NO style=\"FLOAT: left\" SRC=http://list.6park.com/local.php?which=news300&adnum=no3 width=300 height=250></IFRAME> '
ad_content[9] =' <IFRAME ID=news300 FRAMEBORDER=NO SCROLLING=NO style=\"FLOAT: left\" SRC=http://list.6park.com/local.php?which=news300&adnum=no4 width=300 height=250></IFRAME> '


document.write( ad_content[num]  )