function setMake(index) {
	var make_id = window.document.carform.make.options[index].value;

	var url = "?make=" + make_id;
	location.href=url;
}

function checkSubmit(defaultKeywords, defaultLocation) {
	// submit is ok.  Clear out keyword and location if not provided.
	var keyword = window.document.carform.keyword.value;
	if (keyword == defaultKeywords) {
		window.document.carform.keyword.value = "";
	}
	var location = window.document.carform.location.value;
	if (location == defaultLocation) {
		window.document.carform.location.value = "";
	}
	return(true);
}