function toggle_visible(elName, elLabel) {   

	var ellab = document.getElementById (elLabel);

	var isLabVisible = (ellab.style.visibility == "hidden") ? true : false;

	ellab.style.visibility = isLabVisible ? "visible" : "hidden";
	ellab.style.display = isLabVisible ? "inline" : "none" ;

	var el = document.getElementById (elName);

	el.style.visibility = isLabVisible ? "hidden" : "visible";
	el.style.display = isLabVisible ?  "none" : "inline";

}

function toggle_single(elLabel) {   

	var ellab = document.getElementById (elLabel);

	var isLabVisible = (ellab.style.visibility == "hidden") ? true : false;

	ellab.style.visibility = isLabVisible ? "visible" : "hidden";
	ellab.style.display = isLabVisible ? "inline" : "none" ;

}