function submitSearch(searchType){
	switch (searchType){
		case "byKeyword":
			if(document.searchByKeyword.keyword.value != '')
			{
				document.searchByKeyword.submit();
		  	}
			break;
		case "bySubject":
			if(document.searchBySubject.subject.value != '')
			{
				document.searchBySubject.submit();
		  	}
			break;
	}
}