// JavaScript Document
function do_login()
{
	if(document.getElementById('tUsername').value=="")
	{
		alert('Masukkan Username Anda.');
		document.getElementById('tUsername').focus();
		return;
	}
	
	if(document.getElementById('tPassword').value=="")
	{
		alert('Masukkan Password Anda.');
		document.getElementById('tPassword').focus();
		return;
	}
	
	document.f.submit();
}