function toggle_hms(which){
	var obj;
	var what;
	obj=document.all[which];
	what=obj.style.visibility;
	if (what=='hidden')			{ 
		what='visible';
		obj.style.visibility=what;
	}
	else if(what=='visible'){ 
		what='hidden';
		obj.style.visibility=what;
	}
}


function visibilityhide(which){
	var obj;
    obj=document.all[which];
    obj.style.visibility=('hidden');
}