function showmenu(elmnt){
document.getElementById(elmnt).style.visibility="visible";
document.getElementById(elmnt).style.position="relative";
}
function hidemenu(elmnt){
document.getElementById(elmnt).style.visibility="hidden";
document.getElementById(elmnt).style.position="absolute";
}
function hidepic(elmnt){
document.getElementById(elmnt).style.visibility="hidden";
}
function showpic(elmnt){
document.getElementById(elmnt).style.visibility="visible";
}