How can I make the banner links pop in a new window?

[bradg]

This is the banner code below that I use works great, but they dont pop up in a new window. I think I can place a target_blank in somewhere, and maybe I dont?

<!-- Goose Hunting banners Below-->

<div style="width:30%; margin:0 auto">
<if condition="$forumid == 54">
<script language="JavaScript">
<!--
function adArray() {
for (i=0; i*2<adArray.arguments.length; i++) {
this[i] = new Object();
this[i].src = adArray.arguments[i*2];
this[i].href = adArray.arguments[i*2+1];
}
this.length = i;
}
function getAdNum() {
dat = new Date();
dat = (dat.getTime()+"").charAt(8);
if (dat.length == 1)
ad_num = dat%ads.length;
else
ad_num = 0;
return ad_num;
}

var ads = new adArray(
"images/banners/LewisOutdoorAdvturesbanner.gif","http://www.lewisoutdooradventures.com",
"images/banners/flocknocker.gif","http://www.flocknockers.com",
"images/banners/ColumbiaBasinWatfowlBannernew.jpg","http://www.basinwaterfowl.com",
"images/banners/StormOutfittersbanner.jpg","http://www.stormoutfitters.com");

var ad_num = getAdNum(); // don't change this line

document.write(''
+'<A HREF="'+ads[ad_num].href+'"><IMG SRC="'+ads[ad_num].src+'" '
+'BORDER=0 name=js_ad>');

// ****** YOU NEED NOT MODIFY ANYTHING THAT IS NOT IN BETWEEN THESE TWO COMMENTS ****

link_num = document.links.length-1;

function rotateSponsor() {
if (document.images) {
ad_num = (ad_num+1)%ads.length;
document.js_ad.src = ads[ad_num].src;
document.links[link_num].href = ads[ad_num].href;
setTimeout("rotateSponsor()",45000);
}
}
setTimeout("rotateSponsor()",45000);

// -->
</script>
</if>
</div>