function changeImg(index){
	for (var i=1; i<=7; i++){
		var obj = document.getElementById("navi" + i);
		if (i == index){
			obj.style.display = "none";
		}else{
			obj.style.display = "block";
		}
	}
}

function changeTabCnt(index){
	for (var i=1; i<=5; i++){
		var obj = document.getElementById("tabCnt" + i);
		if (i == index){
			obj.style.display = "block";
		}else{
			obj.style.display = "none";
		}
	}
}

function changeNaviImg(index){
	for (var i=1; i<=5; i++){
		var obj = document.getElementById("naviMenu" + i);
		if (i == index){
			obj.style.display = "none";
		}else{
			obj.style.display = "block";
		}
	}
}