increment

javascript:(
function(){ 
   var e,s; 
   IB=1; 
   function isDigit(c) { 
      return ("0" <= c && c <= "9") 
   } 
   L = location.href; 
   LL = L.length; 
   for (e=LL-1; e>=0; --e) 
     if (isDigit(L.charAt(e))) { 
       for(s=e-1; s>=0; --s) 
         if (!isDigit(L.charAt(s))) 
           break; 
       break; 
     } 
   ++s; 
   if (e<0) return; 
   oldNum = L.substring(s,e+1); 
   newNum = "" + (parseInt(oldNum,10) + IB); 
   while (newNum.length < oldNum.length) 
     newNum = "0" + newNum; 
   location.href = L.substring(0,s) + newNum + L.slice(e+1); 
}
)();