/**
 * Navigation Bildwechsel
 */
function toggleNavi(id) {
	var imgOn = "/templates/grass/images/pfeil-rechts.gif";
	var imgOff = "/templates/grass/images/pixel_trans.gif";
	var elm = document.getElementById(id);
	if (elm) {
		elm.src = (elm.src.search(imgOff) > -1) ? imgOn : imgOff;
	}
}

function validateSearchForm() {
	var search = document.getElementById("search_field");
	if(search && search.value != "") return true;
	return false;
}