function hide_show( hide , show ){
	// split the lists into an array
	// the hide list will be hidden and the show list will be show
	if( hide.length > 0 ) {
		var hide = hide.split( ',' );
		
		for (h = 0; h < hide.length; h++)
		{
			//opacity(hide[h], 100, 0, 500);
			document.getElementById( hide[h] ).style.display = "none";	
		} //end loop
	} // end if
	if( show.length > 0 ) {
		var show = show.split( ',' );
		for ( s = 0; s < show.length; s++ )
		{
			//opacity(show[s], 0, 100, 500)
			document.getElementById( show[s] ).style.display = "";	
		}// end loop
	} // end if
}