createNotes=function(){

            showNote=function(){
                        // shows login box
                        var note1=document.getElementById('loginbox');
                        note1.style.visibility='visible';
            }

            hideNote=function(){
                        // hides login box
                        var note1=document.getElementById('loginbox');
                        note1.style.visibility='hidden';
                        }
                var a1=document.getElementById('a1');
                // shows login box when clicked
                a1.onclick=showNote;
                var a2=document.getElementById('a2');
                // hides login box when clicked
                a2.onclick=hideNote;
   }
    // execute code once page is loaded
    window.onload=createNotes;