function cleartext(search_node) {
	search_node.setAttribute('value', '');
	}

var old_on_search_category = "searchnav_all";

function chgSearchNav(search_category_ele) {
	
	/* Get old tab IDs */
	var ele=document.getElementById(old_on_search_category);
	
	/* Set old tab off */
	ele.className="off";
	
	/* Get new tab IDs */
	var ele=document.getElementById(search_category_ele);

	
	/* Set new tab on */
	ele.className="search_on";


	/* Change database parameter */	
	var database_ele = document.getElementById("search_chooser");
	var eleId=ele.getAttribute('id');
	switch (eleId) {
		case "searchnav_all":
		case "searchnav_articles":
			database_ele.setAttribute("value","current");
			break;
		case "searchnav_archive":
			database_ele.setAttribute("value","archive");
			break;
		case "searchnav_calendar":
			database_ele.setAttribute("value","archive");
			break;
		case "searchnav_dining":
			database_ele.setAttribute("value","dining_guide");
			break;
		default:
			database_ele.setAttribute("value","current");
			break;
	}

	
	/* Set old tab to new tab value */
	old_on_search_category = search_category_ele;
	
	}