function checkTatamiKing(e, sender) {
	// This form.
	var f = e.form;
	// Foam filler checkbox was clicked.
	if ((sender == 2) && (e.checked == true)) {
		// Tatami mat checkbox.
		var tm = f.add_tatami;
		// Not king size or not Black.
		if (f.size.selectedIndex != 3) {
			alert ("The 2\" foam filler is only required for king size beds.\n\nIf you want to fill the space above the slats, consider a Tatami mat.");
			e.checked = false;
		// Tatami is also checked.
		} else if (tm.checked) {
			alert ("The Tatami mat is not required when you order a 2\" foam filler.");
			tm.checked = false;
		}
	}
	// Size must be king, or uncheck foam filler.
	if (f.size.selectedIndex != 3) f.foamfiller.checked = false;
}

function checkTatamiMat(e) {
	var f = e.form;
	var ff = f.foamfiller;
	if (ff.checked) {
		alert ("The 2\" foam filler is not required when you order a Tatami mat.");
		ff.checked = false;
	}
}