function validate_login()
	{
	bol_submit = true;
	err_msg = "Please check the following:\n";
	this_form = window.document.login_form;
	
	if (this_form.u_login.value == "")
	{	bol_submit = false;
		err_msg = err_msg + "Username\n";}
	
	if (this_form.u_password.value == "")
	{	bol_submit = false;
		err_msg = err_msg + "Password\n";}
	
	if (bol_submit)
	{	return true;}
	else
	{	alert(err_msg);
		return false;}
}