function cssChangeClass( object_name, class_name ) {
	object_name = object_name.trim();
	class_name  = class_name.trim();
	document.getElementById(object_name).className = class_name;
}

function cssShowLayer(layer_ref) {
	layer_ref = layer_ref.trim();
	state = 'block';
	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;
	}
}

function cssHideLayer(layer_ref) {
	layer_ref = layer_ref.trim();
	state = 'none';

	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;
	}
}

function cssHidden(layer_ref) {
	layer_ref = layer_ref.trim();
	mode = "hidden";
	if (document.all) { //IS IE 4 or 5 (or 6 beta
		eval( "document.all." + layer_ref + ".style.visibility = " + mode);
	}
	if (document.layers) { //IS NETSCAPE 4 or below
		document.layers[layer_ref].visibility = mode;
	}
	if (document.getElementById &&!document.all) {
		hza = document.getElementById(layer_ref);
		hza.style.visibility = mode;
	}
}
	
function cssVisible(layer_ref) {
	layer_ref = layer_ref.trim();
	mode = "visible";
	if (document.all) { //IS IE 4 or 5 (or 6 beta
		eval( "document.all." + layer_ref + ".style.visibility = " + mode);
	}
	if (document.layers) { //IS NETSCAPE 4 or below
		document.layers[layer_ref].visibility = mode;
	}
	if (document.getElementById &&!document.all) {
		hza = document.getElementById(layer_ref);
		hza.style.visibility = mode;
	}
}