function hide_crumbs(){
	if ($('crumbs_div')){
		$('crumbs_div').style.display='none';
		$('alt_empty_crumbs_div').style.display='';
	}
}
function show_crumbs(){
	if ($('crumbs_div')){
		$('crumbs_div').style.display='';
		$('alt_empty_crumbs_div').style.display='none';
	}
}
function search(host){
	document.location=host+'?d=search&whattosearch='+$('search_text_input').value;
}