gistfile1.js

function nextSlide() {
    myEditor.saveHTML();
    window.setTimeout(function() {
        var current = YAHOO.util.Dom.get('currentslide').value;
        YAHOO.util.Dom.get(current).value = myEditor.get('textarea').value;
        myEditor.setEditorHTML(YAHOO.util.Dom.get('nextslideid').value);
        YAHOO.util.Dom.get('currentslide').value = 'nextslideid';
    }, 200); // So that saveHTML has had time to run
}