function showmenu(elmnt){document.getElementById(elmnt).style.visibility="visible"}
function hidemenu(elmnt){document.getElementById(elmnt).style.visibility="hidden"}
function changeDisplay(oName)
{
var ObjCh = findObj(oName);
if( !ObjCh ) { return; }
if( ObjCh.style ) { ObjCh = ObjCh.style; }
ObjCh.display = ( ObjCh.display == 'none' ) ? 'block' : 'none';
}