createNotes=function(){

            showNote=function(){
                        // gets note1 element
                        var note1=document.getElementById('note_home');
                        // shows note1 element
                        note1.style.visibility='visible';
            }

            hideNote=function(){
                        // gets note1 element
                        var note1=document.getElementById('note_home');
                        // hides note1 element
                        note1.style.visibility='hidden';
            }
            var a1=document.getElementById('a1');
            // shows note1 element when mouse is over
            a1.onmouseover=showNote;
            // hides note1 element when mouse is out 
            a1.onmouseout=hideNote;
}
// execute code once page is loaded
window.onload=createNotes;