function showhide(targetID) {
		//change target element mode
		var elementmode = document.getElementById(targetID).style;
		elementmode.display = (!elementmode.display) ? 'none' : '';
	}

	function changetext(changee,oldText,newText) {
		//changes text in source element
		var elementToChange = document.getElementById(changee);
		elementToChange.innerHTML = (elementToChange.innerHTML == oldText) ? newText : oldText;
	}

	function workforchange(targetID,sourceID,oldContent,newContent) {
		showhide(targetID);
		changetext(sourceID,oldContent,newContent);
	}

	// Cruft note: The content of "oldContent," the third argument of the
	// workforchange() function, must match the existing content of the changer text.