function Validate_Search()
{
	if (document.search.search_string.value==""){
		alert("Please enter keyword(s) to search for.")
		document.search.search_string.focus();
		return false;
	}
	if (document.search.search_string.value.length<=2){
		alert("Please enter at least 3 letter word to search.")
		document.search.search_string.focus();
		return false;
	}
		return true;
}