function updateNavigation() {
	if (document.getElementById("make").value == "")
		loadAjaxHtml("/search/find-a-car1/?N=" + document.getElementById("location").value, document.getElementById("search_controls"));
	else
		loadAjaxHtml("/search/find-a-car1/?N=" + document.getElementById("make").value + document.getElementById("model").value + document.getElementById("location").value, document.getElementById("search_controls"));
}

function resetForm() {
	document.getElementById("make").selectedIndex = 0;
	document.getElementById("model").selectedIndex = 0;
	document.getElementById("location").selectedIndex = 0;
}

function doSearch(target, sort, searchResultsParam) {
	
	var target = target + "Ns=" + sort + "&N=" + document.getElementById("advertisementID").value + document.getElementById("location").value;
	
	if (document.getElementById("make").value != "")
		target += "+" + document.getElementById("make").value;
	
	if (document.getElementById("model").value != "")
		target += "++" + document.getElementById("model").value;

	window.parent.location = target+searchResultsParam;
}