Code:

 

<script>
// 1 Signature Per Page In Threads - Revsered Action (Shows Last Posts Signature)
// Created By Zero Tolerance
// ©2003-2004 Game Zone | Evolution, All Rights Reserved

sigArray = new Array();
sigArray[0] = "";

if(location.href.match(/showtopic=(\d+)/i)){
Div = document.getElementsByTagName('div')
for(d=(Div.length-1);d>-1;d--){
if(Div[d].className == "signature"){
Hide = 0
 for(s=1;s<sigArray.length;s++){
  if(sigArray[s] == Div[d].innerHTML){
  Hide++
  }
 }
 if(Hide > 0){
 Div[d].style.display = 'none'
 } else {
 sigArray[sigArray.length] = Div[d].innerHTML
 }
}
}
}
</script>