function del()
{
document.getElementById("menu").style.visibility = 'hidden';
}
function trad()
{
	if(event.keyCode == 107)
        {
        document.getElementById("menu").style.visibility = 'visible';
	document.getElementById("menu").style.top = event.clientY + document.body.scrollTop;
	document.getElementById("menu").style.left = event.clientX + document.body.scrollLeft;
        }
        if(event.keyCode == 109)
        {
        document.getElementById("menu").style.visibility = 'hidden';
	}
}
document.onkeydown = trad;