function showNav() {

dropMenItem = document.getElementById("nav");
dropMenItem.style.height="400px";
dropMenItem.style.width="510px";

      	
}

function hideNav() {

upMenItem = document.getElementById("nav");
upMenItem.style.height="70px";
dropMenItem.style.width="510px";



}


function reveal(id) {document.getElementById(id).style.visibility="visible"}
function hide(id) {document.getElementById(id).style.visibility="hidden"}