function menu_link(num)
{
	switch(num)

	{

	  case 1:window.location="membership.htm" ;break;

	  case 2:window.location="Realtime.htm" ;break;

	  case 3:window.location="jobs.htm" ;break;

	  case 4:window.location="message_boards.htm" ;break;

	}
}