function SwapNavi(Target) {
	switch(Target) {
		case "tab_navi01":
		case "tab_navi02":
		case "tab_navi03":
		case "tab_navi04":
			ShowMenu("tab_navi00", "none");
			ShowMenu("tab_navi01", "none");
			ShowMenu("tab_navi02", "none");
			ShowMenu("tab_navi03", "none");
			ShowMenu("tab_navi04", "none");
			break;
		default:
			break;
	}

	ShowMenu(Target, "block");
}

function ShowMenu(Target, blockstyle) {
	document.getElementById(Target).style.display = blockstyle;
}