function do_action(n) //select actions, keyed to option value
{
switch(n)
{
	default : undisplay('private_party_details'); break;
	case 'Private Parties' : display('private_party_details'); break;
}
}

function display() //show element
{
var id, el, a = 0;
for (a; a < arguments.length; ++a)
{
id = arguments[a];
if (el = document.getElementById(arguments[a]))
el.style.display = '';
}
}

function undisplay() //un-show element
{
var id, el, a = 0;
for (a; a < arguments.length; ++a)
{
id = arguments[a];
if (el = document.getElementById(arguments[a]))
el.style.display = 'none';
}
}