function advancedsearch() {
		basic = $('search_basic');
		advanced = $('search_advanced');
		searchbox = $('search_box');
		Element.hide(basic);
		advanced.style.display = 'block';
		Element.addClassName(searchbox,'advanced');
	}
	function basicsearch() {
		basic = $('search_basic');
		advanced = $('search_advanced');
		searchbox = $('search_box');
		Element.hide(advanced);
		basic.style.display = 'block';
		if (Element.hasClassName(searchbox,'advanced'))
			Element.removeClassName(searchbox, 'advanced')
	}