function rollOn(id){
	
	
	category = document.getElementById('category'+ id);
	child = document.getElementById('child'+ id);
		
		if(category!=undefined){
			category.className='on'
		}
		if(child!=undefined){
			child.className='on'
		}
	}
	function rollOff(id){

	category = document.getElementById('category'+ id);
	child = document.getElementById('child'+ id);
		
		if(category!=undefined){
			category.className='off'
		}
		if(child!=undefined){
			child.className='off'
		}
	}