function validate() {
 if (document.f.home.value=='-') {
	alert("Please select a home type!");
	document.f.home.focus();
	return false;
 }
 if (document.f.price.value=='-') {
	alert("Please select a price range!");
	document.f.price.focus();
	return false;
 }
 if (document.f.beds.value=='-') {
	alert("Please select how many bedrooms do you need!");
	document.f.beds.focus();
	return false;
 }
 return true;
}