function showMenu(id){
		setLayerState(id, 'visible')
}

function hideMenu(id){
		//t=setTimeout('setLayerState("'+param+', \'hidden\'")', 1250);
		setLayerState(id, 'hidden')
}

function setLayerState(layer_ref, state){
	
	//SET STATE
	if (document.all) { //IS IE 4 or 5 (or 6 beta) 
		eval("document.all." + layer_ref + ".style.visibility = " + state); 
	}
	
	if (document.layers) { //IS NETSCAPE 4 or below 
		document.layers[layer_ref].visibility = state; 
	} 
	
	if (document.getElementById) { 
		hza = document.getElementById(layer_ref); 
		hza.style.visibility = state; 
	} 

}