ThaiSEOBoard.com

http://scriptasylum.com/tutorials/encdec/javascript_encoder.html

function dF(s){
  var s1=unescape(s.substr(0,s.length-1)); 
  var t='';
  for(i=0;i<s1.length;i++)
  t+=String.fromCharCode(s1.charCodeAt(i)-s.substr(s.length-1,1));
  document.write(unescape(t));
}
dF('%264DTDSJQU%2631MBOHVBHF%264E%2633kbwbtdsjqu%2633%264F%261B00%2631TBNQMF%2631TDSJQU%2631%26342%261Bbmfsu%2639%2638Ifmmp%2631Xpsme%2638%263%3A%264C%261B%264D0TDSJQU%264F%261B%261B%264DTDSJQU%2631MBOHVBHF%264E%2633kbwbtdsjqu%2633%2631TSD%264E%2633zpvs%60kt%60gjmf/kt%2633%264F%261B00%2631TBNQMF%2631TDSJQU%2631%26343%2631.%2631DBMMJOH%2631BO%2631FYUFSOBM%2631KT%2631GJMF%261B%264D0TDSJQU%264F%261B1');