function showmenu (id){ 
    var i = 0; 
    for (i = 1; i <= 6; i++)
        {
            if(id == i) 
             {
                var maindiv = document.getElementById("home-main" + i);
                maindiv.className = "show";
                var menuitem = document.getElementById("hoverover" + i);
                menuitem.className = "selected" + i;
            } 
            else 
            {   
                var maindiv = document.getElementById("home-main" + i);
                maindiv.className = "hidden";
                var menuitem = document.getElementById("hoverover" + i);
                menuitem.className = "unselected";
             };
        }   

}