function showLoading () {
	if (top.head && top.head.showEarth) {
		top.head.showEarth();
	} else {
//		alert ("showEarth not found");
		setTimeout("showLoading()",200);
	}
}

function hideLoading () {
	if (top.head && top.head.hideEarth) {
		top.head.hideEarth();
	} else {
//		alert ("hideLoading not found");
		setTimeout("hideLoading()",200);
	}
}

window.onload	 = hideLoading;
window.onunload  = showLoading;