function doAction(file_id){
		var item_action = document.getElementById(file_id+'_list');
		if(item_action.style.display=='none'){			
			expanIt(file_id);
					
			if(file_id!='trong'){
				closeIt('trong');
			}

}
		else{
			closeIt(file_id)
		}
	}
	function expanIt(file_id){
		var item_action;
		switch(file_id){

				case 'trong' :
				item_action = document.getElementById('trong_list');
				if(item_action!=null)	item_action.style.display = '';
				item_action = document.getElementById('trong_1');
				if(item_action!=null)	item_action.style.display = '';
				item_action = document.getElementById('trong_2');
				if(item_action!=null)	item_action.style.display = '';
				item_action = document.getElementById('trong_3');
				if(item_action!=null)	item_action.style.display = '';
				item_action = document.getElementById('trong_4');
				if(item_action!=null)	item_action.style.display = '';
				item_action = document.getElementById('trong_5');
				if(item_action!=null)	item_action.style.display = '';
				item_action = document.getElementById('trong_6');
				if(item_action!=null)	item_action.style.display = '';
				break;				

		}
		return ;
	}
	function closeIt(file_id){
		var item_action;
		switch(file_id){
			    
				case 'trong' :
				item_action = document.getElementById('trong_list');
				if(item_action!=null)	item_action.style.display = 'none';
				item_action = document.getElementById('trong_1');
				if(item_action!=null)	item_action.style.display = 'none';
				item_action = document.getElementById('trong_2');
				if(item_action!=null)	item_action.style.display = 'none';
				item_action = document.getElementById('trong_3');
				if(item_action!=null)	item_action.style.display = 'none';
				item_action = document.getElementById('trong_4');
				if(item_action!=null)	item_action.style.display = 'none';
				item_action = document.getElementById('trong_5');
				if(item_action!=null)	item_action.style.display = 'none';
				item_action = document.getElementById('trong_6');
				if(item_action!=null)	item_action.style.display = 'none';
				break;	
		}
		return ;
	}