var timer;

function navshow(item) {
    var menu = document.getElementById(item);
    navhide("ddMenu1");
    //navhide("ddMenu2");
    navhide("ddMenu3");
    menu.style.display = "block";
}

function navhide(item) {
    var menu = document.getElementById(item);
    menu.style.display = "none";
}