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.