function toggle(a, b) {
	if (document.getElementById) {
		document.getElementById(a).style.display=(b)?"block":"none";
	}
}


function double_toggle(a, b, c, d) {
	if (document.getElementById) {
		document.getElementById(a).style.display=(b)?"block":"none";
		document.getElementById(c).style.display=(d)?"block":"none";
	}
}

function triple_toggle(a, b, c, d, e, f) {
	if (document.getElementById) {
		document.getElementById(a).style.display=(b)?"block":"none";
		document.getElementById(c).style.display=(d)?"block":"none";
		document.getElementById(e).style.display=(f)?"block":"none";
	}
}