Keyarn Graham Plz sir how can i change dat wap4dollar img banner inside this script

<script> var x = document.getElementsByClassName("ads_pop_in"); var y = Math.floor(Math.random() * x.length); var z = Math.floor(Math.random() * x.length); x[y].innerHTML = '\<div class=\"ad\"\>\<b\><div class="full" style="background:url(/B/Bg/download.png)"><table cellspacing="0px"><tr align="middle"><td align="left"><img src="http://keyarn.xtgem.com/admin/Icons/ad.png" alt="**" class="ico" width="27px" height="30px" /></td><td align="left"><img src="http://keyarn.xtgem.com/Admin/rating.gif" /><br/><a href="http://wap4dollar.com/ad/serve.php?id=9zxsoiy497"><img src="http://wap4dollar.com/ad/imgs/wap4dollar_banner_6.jpg" width="300" height="50" alt="" /></a></td></tr></table></div><hr style="border:1px dotted red;"/>\</b\>\</div\>'; x[z].innerHTML = '\<div class=\"ad\"\>\<b\><div class="full" style="background:url(/B/Bg/download.png)"><table cellspacing="0px"><tr align="middle"><td align="left"><img src="http://keyarn.xtgem.com/admin/Icons/ad.png" alt="**" class="ico" width="27px" height="30px" /></td><td align="left"><img src="http://keyarn.xtgem.com/admin/rating.gif" /><br/><a href="http://wap4dollar.com/ad/serve.php?id=9zxsoiy497"><img src="http://wap4dollar.com/ad/imgs/wap4dollar_banner_3.jpg" alt="" /></a></td></tr></table></div><hr style="border:1px dotted red;"/>\</b\>\</div\>'; </script>

to this my js file

<script language="javascript" src="http://keyarn.xtgem.com/Ads.js"></script></center></div></a>

asin i want to use that my js file as the inner html because the wap4dollar img banner does not change that is why i want to chang but iam unable to do that due to that my Ads.js is also a script. Plz can you help me out?