function js_menuDisplay(id, cnt){
	var imgId     = "img_" + id;
	var ovImgId   = "img_" + id + "_ov";

	var thisMenu  = null;
	var otherMenu = null;

	for (i=0; i<=7; i++) {
		var menuId = "sn_" + i;
		if (id == i) {
			thisMenu  = document.getElementById(menuId);
			if(thisMenu){
				thisMenu.style.display = "block";
			}

		}else {
			otherMenu = document.getElementById(menuId);
			if(otherMenu){
				otherMenu.style.display = "none";
			}
		}
	}
	js_imgDisplay(id);
}

function js_imgDisplay(id){
	var imgId    = "img_" + id;
	var ovImgId  = "img_" + id + "_ov";

	document.getElementById(ovImgId).style.display = "block";
	document.getElementById(imgId).style.display   = "none";
}

function js_imgHidden(id){
	var imgId    = "img_" + id;
	var ovImgId  = "img_" + id + "_ov";

	document.getElementById(ovImgId).style.display = "none";
	document.getElementById(imgId).style.display   = "block";
}

function js_doHidden(id, cnt){
	js_imgHidden(id);
//	window.setTimeout('js_menuHidden(' + cnt + ')', 1000);
}

function js_menuHidden(cnt){
	var dMenu = null;
	var hMenu = null;

	for(i=0; i<7; i++){
		var hMenuID = "sn_" + i
		hMenu = document.getElementById(hMenuID).style;
		hMenu.display = "none";
	}

	var dMenuID = "sn_" + cnt;
	document.getElementById(dMenuID).style.display = "block";
}