function show_search_hints() {
	if (!$('help_popup')) {
		var login_overlay_div = document.createElement("div");
		login_overlay_div.id = "help_popup";
		login_overlay_div.style.display = "none";
		if (!$('login_form')) {
			$('site_header').appendChild(login_overlay_div);
		} else {
			$('login_form').appendChild(login_overlay_div);	
		}
		new Ajax.Updater('help_popup',"/search/hints",{ onComplete: function() {Effect.Appear('help_popup', {duration: 0.2});}});

	}
	
}


function close_search_hints() {
	if ($('help_popup')) {
		Effect.Fade('help_popup', {duration: 0.2});
		$('help_popup').parentNode.removeChild($('help_popup'));
	}	
}