function showmenu(elmnt){
	document.getElementById(elmnt).style.visibility="visible"
}
function hidemenu(elmnt){
	document.getElementById(elmnt).style.visibility="hidden"
}

function winopen(PageURL){
  window.open(PageURL, 'NewWindow','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width=750,height=550')
}