var currentLayer = "cell1"; //Tab
	var currentDiv = "d1";
	var defaultColor = "#FFFFFF"; //Tab與內容區的預設備景色
	var colorArray = new Array("","","","","");  // 切換Tab時，Tab與內容區的背景色

	function showLayer(obj,div,cIndex){
		if(currentLayer!=obj.id) {
			showIt(currentLayer,currentDiv,cIndex,false);
			currentLayer = obj.id;
			currentDiv = div;
			showIt(currentLayer,currentDiv,cIndex,true); 
		}
	}

	function showIt(o,d,cIndex,mode){
		var obj = document.getElementById(o);
		var div = document.getElementById(d);
		obj.className = mode?"active":"inactive";  //class="active" 為作用中的tab的樣式
		div.style.display = mode?"block":"none";
		obj.style.backgroundColor = mode?colorArray[cIndex]:defaultColor;
		div.style.backgroundColor = mode?colorArray[cIndex]:defaultColor;
	}