function mail_valid()
{
	if (mail_login.uname.value=="")
	{
		alert ("Please enter your user name to login.");
		mail_login.uname.focus();
		return(false);
	}
	else if (mail_login.pass.value=="")
	{
		alert ("Please enter your password to login.");
		mail_login.pass.focus();
		return(false);
	}
	else return(true);
}