Handling event OnSave

// called on save
function doSave(){
alert('Saved.');
document.getElementById('someElement').innerHTML = 'Saved!';
return false; //this disables default action (submitting the form)
}
// called when FCKeditor is done starting..
function FCKeditor_OnComplete( editorInstance ){
editorInstance.LinkedField.form.onsubmit = doSave;
}