function openmenu( targetId ) {
     if (document.getElementById) {
	 target = document.getElementById( targetId );
	      if (target.style.visibility = "visible") {
		        target.style.visibility == "";
		   } 
	}
}
function closemenu( targetId ) {
     if (document.getElementById) {
	 target = document.getElementById( targetId );
	      if (target.style.visibility = "hidden") {
		        target.style.visibility == "";
		   } 
	}
}