var visible = false;

function toggle(what){
                if(visible){
			hide(what);
                } else {
                	show(what);
                }

}

function hide(what){
                var object = document.getElementById(what);
                object.style.display = "none";
                visible = false;
}
function show(what){
                var object = document.getElementById(what);
                object.style.display = "block";
                visible = true;
}