html - JavaScript finding, displaying nodes -

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there software adds "powered by..." text , image link. in it's license says it's not forbidden remove addition. hand, when refresh page, powered thing added again, need hide it. there couple ways, want javascript help. here have in every page bottom:

logo

this code can see:

</td></tr></table> </td></tr></table> <br/><br/><center><small> <a href="http://pages.ebay.com/blackthorne/" target="_blank"><img align=absbottom border=0 src="http://www.blackthornesw.com/bthome/blackthorneb2shade_gb.bmp"</img></a></small></center><br/><center><font face=arial,helvetica size=2>powered <a href="http://pages.ebay.com/blackthorne/" target="_blank">ebay blackthorne 04.11.017</a></font></center> <script> function erroroff() {return true;} window.onerror = erroroff; settimeout("document.images.ebaybig.style.display='none'",300); </script>

before code (at bottom of html) add javascript found on internet , result: enter image description here

here full code (with javascript found):

<script type=text/javascript> window.onload=function(){ findcenter(); } function findcenter() { nodes = document.getelementsbytagname("center"); subnode = nodes[nodes.length-1]; var link = subnode.getelementsbytagname("a")[0].href; if(link.indexof("pages.ebay") != -1) { subnode.style.display="none"; } } </script> </td></tr></table> </td></tr></table> <br/><br/><center><small> <a href="http://pages.ebay.com/blackthorne/" target="_blank"><img align=absbottom border=0 src="http://www.blackthornesw.com/bthome/blackthorneb2shade_gb.bmp"</img></a></small></center><br/><center><font face=arial,helvetica size=2>powered <a href="http://pages.ebay.com/blackthorne/" target="_blank">ebay blackthorne 04.11.017</a></font></center> <script> function erroroff() {return true;} window.onerror = erroroff; settimeout("document.images.ebaybig.style.display='none'",300); </script>

as can see text "powered by..." gone, image still appears. how should change javascript image gone too?

i made myself, if can optimize somehow thankful, here mine solution:

<script type=text/javascript> window.onload=function(){ findcenter(); } function findcenter() { nodes = document.getelementsbytagname("small"); subnode = nodes[nodes.length-1];  var link = subnode.getelementsbytagname("a")[0].href; if(link.indexof("pages.ebay") != -1) { subnode.style.display="none"; }  nodes2 = document.getelementsbytagname("center"); subnode2 = nodes2[nodes2.length-1];  var link2 = subnode2.getelementsbytagname("a")[0].href; if(link2.indexof("pages.ebay") != -1) { subnode2.style.display="none"; } } </script>

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