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

function changetext(changee,oldText,newText) {
var elementToChange = document.getElementById(changee);
elementToChange.innerHTML = (elementToChange.innerHTML == oldText) ? newText : oldText;
}

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