Javascript and .substring( ) : Strange

I'am trying to parse an Adobe AES files with javascript. AES are text files that contain a color combo (generaly fives hexadecimals colors).You can download those files from http://kuler.adobe.com/.

However i have strange result with the .substring( ) function :

var result = new Object();
var tempList=new Array(); 
function (__structure HEXAStructure) main (__string ASE_String)
{
 
   //* Parse the string in an array
   tempList= ASE_String.split("#")             
 
   //* delete the first Index
   tempList=tempList.splice(1,tempList.length)   
 
   //* Extract the hexadecimal 6 digits
   for (var i in tempList){
      tempList[i]=tempList[i].substring(1,13)      
                  }
 
 
result.HEXAStructure=tempList;
return result;
}

the result is an array with five hexadecimal : All seems to be fine but when i count the 6 digits they are 12.... Probably because of ".substring(1,13)" but it's seems the are invisible characters... So it break the conversion to RGB (see attached JS parse ASE.qtz)

I'am forgetting something :) Any advice?