function checkForm() {
	if(document.form1.userID.value == "") {
		alert("User ID kosong!");
		document.form1.userID.focus();
	}
	else if(document.form1.passwd.value == "") {
		alert("Password kosong!");
		document.form1.passwd.focus();
	}
	else {
		document.form1.submit();
	}
}