function visibleControl (id,btId) {
	
	t = document.getElementById(id);
	bt = document.getElementById(btId);
	if (btId=='btCompanyDescription') {
		maptitle = document.getElementById("mapTitleContainer");
		map = document.getElementById("mapContainer");
	}
	
	
	if (t.className == "close") {
		t.className = "open";
		bt.innerHTML  ="閉じる △";
	} else if (t.className == "open") {
		t.className = "close";
		bt.innerHTML  ="続きをよむ ▽";
	}

	if (t.className == "close rest longText") {
		t.className = "open rest longText";
		bt.innerHTML  ="閉じる △";
		if (btId=='btCompanyDescription') {
			maptitle.className = "open";
			map.className = "open";
		}
	} else if (t.className == "open rest longText") {
		t.className = "close rest longText";
		bt.innerHTML  ="続きをよむ ▽";
		if (btId=='btCompanyDescription') {
			maptitle.className = "close";
			map.className = "close";
		}
	}
	
	
	
	// alert(btId);
	
	
}