function validateSearch(search) {
	var msgText = "";
	
	if (search.Category.selectedIndex == "" && search.ZipCode.value == "" 
		&& search.State.value == "" && search.month.value == "" 
		&& search.year.value == "") 
		msgText += "Please select at least one search criteria.";

	if (msgText != "")
		{
			alert(msgText);
			return false;
		} 
		
}