function toggleVisibility( id ) {
	var block = document.getElementById( id );

	if ( block.style.display == "block" ) {
		showHide( id, false );
	} else {
		showHide( id, true );
	}
}


function showHide( id, onOff ) {
	var objBlock = document.getElementById( id );

	if ( onOff ) {
		objBlock.style.display = "block";
		objBlock.style.visibility = "visible";
		return true;
	} else {
		objBlock.style.display = "none";
		objBlock.style.visibility = "hidden";
	}
}