function SetExtent( NewExtent, SubmitNow) {
	document.mapform.imgext.value = NewExtent;
	if (SubmitNow == 1) {
		document.mapform.submit();
		return false;
	} else {
		// TODO: no submit probably doesn't make sense without
		// a feedback message...
		return true;
	}
}

function SelectExtent ( SubmitNow ) {
	var that = document.mapform.selectextent;
	var NewExtent = that.options[that.selectedIndex].value;

	document.mapform.imgext.value = NewExtent;

	if (SubmitNow == 1) {
		document.mapform.submit();
		return false;
	} else {
		return true;
	}
}