<script type="text/javascript">
function chklogin(e){
if (e.user_name.value =="") {
alert( "Please enter your username!\n\n กรุณาใส่ชื่อผู้ใช้งาน");
e.user_name.focus();
return false;
}
if (e.password.value =="") {
alert( "Please enter your password!\n\n กรุณาใส่รหัสผ่าน");
e.password.focus();
return false;
}
}
</script>