function hlb(letter)
{ 
	if( typeof(letter) != 'string'){letter = firstletter; }	
  for(i=0; i<betucount; i++){
  	if(letter==document.getElementById('letter_' + i).innerHTML){ document.getElementById('letter_' + i).style.color = '#000';}
  	else{ document.getElementById('letter_' + i).style.color = '#24468A';}
  	}
}

Event.observe( window,'load', hlb);