document.observe("dom:loaded", function() {
  // do whatever
  correctLastSubitem();
});

correctLastSubitem = function(){ // Fixed by TOM, cause of IE Problems
	if( $('left_cont') ){
		var subitem = $TAG('a',$OBJ('left_cont'))[$TAG('a',$OBJ('left_cont')).length-1];  
		subitem.className='last';
	}
}

correctFirstSubhead = function(){ // Fixed by TOM, cause of IE Problems
	if( $('subHeads') ){
		var subitem = $TAG('a',$OBJ('subHeads'))[0];  
		subitem.className='first';
	}
}