function changeClass(id){
		changeItem = document.getElementById(id);	//find the item to be change by its id
		
		own=document.getElementById(id+'Root');
	
	if(changeItem.className=='show'){
		changeItem.className='hide';
		own.className='dListClose';
		
		}
	else{
		own.className='dListOpen';
		changeItem.className='show';
		
	}	
}