function toggle(node)
{
	var imageElement = node.childNodes[0];
	var tableElement = node.nextSibling;
	
	if (tableElement.style.display == "none")
	{
	   tableElement.style.display = "block";
	   imageElement.src = "img/arrow_u.gif";
	}
	else
	{
	 	tableElement.style.display = "none";
	 	imageElement.src = "img/arrow_d.gif";
	}	
}

function bookmark()
{
	if( window.sidebar && window.sidebar.addPanel ) {
	    //Gecko (Netscape 6 etc.) - add to Sidebar
	    window.sidebar.addPanel( this.title, this.href, '' );
	} else if( window.external && ( navigator.platform == 'Win32' ||
	      ( window.ScriptEngine && ScriptEngine().indexOf('InScript') + 1 ) ) ) {
	    //IE Win32 or iCab - checking for AddFavorite produces errors in
	    //IE for no good reason, so I use a platform and browser detect.
	    //adds the current page page as a favourite; if this is unwanted,
	    //simply write the desired page in here instead of 'location.href'
	    window.external.AddFavorite( location.href, document.title );
	} else if( window.opera && window.print ) {
	    //Opera 6+ - add as sidebar panel to Hotlist
	    return true;
	} else if( document.layers ) {
	    //NS4 & Escape - tell them how to add a bookmark quickly (adds current page,
	    //not target page)
	    window.alert( 'Please click OK then press Ctrl+D to create a bookmark' );
	} else {
	    //other browsers - tell them to add a bookmark (adds current page, not target page)
	    window.alert( 'Please use your browser\'s bookmarking facility to create a bookmark' );
	}
	return false;
}