//--------------------------------------------------------------------------------------------------------
function check_form()
{
	f=document.login;

	if(f.username.value=="") 
	{
		alert("Please fill in the username!");
		f.username.focus();
		return false;
	}
	if(f.password.value=="") 
	{
		alert("Please fill in the password!");
		f.password.focus();
		return false;
	}
	

	return true;
}