<!--
function showhide(layer_ref) {
	//alert (document.getElementById(layer_ref).display);
	
	
	//document.getElementById(layer_ref).focus();
	var state = document.getElementById(layer_ref).style.display;
	
	
	if (state == 'block') {
	//state = 'none';
	document.getElementById(layer_ref).style.display = 'none';
	}
	else {
	//state = 'block';
	document.getElementById(layer_ref).style.display = 'block';
	}
	//alert ("state="+state);
	/*
	if (document.all) { //IS IE 4 or 5 (or 6 beta)
	eval( "document.all." + layer_ref + ".style.display = state");
	}
	if (document.layers) { //IS NETSCAPE 4 or below
	document.layers[layer_ref].display = state;
	}
	if (document.getElementById &&!document.all) {
	hza = document.getElementById(layer_ref);

	
	hza.style.display = state;
	}
	*/

} 

//-->