var arrBtns = new Array();
	var arrDetails = new Array();
	function detailOn(num){
		detailOff();
	
		btn = document.getElementById(arrBtns[num]);
		btn.className = 'on';
		layer = document.getElementById(arrDetails[num]);
		layer.style.display = '';
	}
	
	function detailOff(){
		for (i=0; i<arrDetails.length; i++){
			btn = document.getElementById(arrBtns[i]);
			btn.className = 'off';
			l = document.getElementById(arrDetails[i]);
			l.style.display = 'none';
		}
	}