var picture_handle, picture_id, picture_source;
function picture_change (picture_id,picture_source) {
	picture_handle=document.getElementById(picture_id);
	if ( picture_handle ) {
		picture_handle.src=picture_source;
	}
}
			
var menu_requested, menu_mode, menu_picture_ext;
menu_picture_ext="gif";
function seq_menu(menu_requested,menu_mode) {
	if ( menu_mode=="over" || menu_mode=="click" ) {
		picture_change("menu_"+menu_requested,"menu_"+menu_requested+"_selected"+"."+menu_picture_ext);
		if ( menu_mode=="click" ) {
			menu_current=menu_requested;
		}
	}
	if ( menu_mode=="out" && node_id!=menu_requested) {
		picture_change("menu_"+menu_requested,"menu_"+menu_requested+"."+menu_picture_ext);
	}
}

var layer_id;
var layer_mode;
function layer_display ( layer_id , layer_mode ) {
	if ( document.getElementById(layer_id) ) {
		document.getElementById(layer_id).style.display=layer_mode;
	}
}

function seq_init() {
	//
}