function valider()
{
	var f = document.forms[0];
	var ret = true;
	var err = "Those errors appear:\n";
	
	if (f.f_User_Last_Name.value.length<1)
	{
		ret = false;
		err += "\nYour name is empty.";
	}
	if (f.password_1.value.length<1)
	{
		ret = false;
		err += "\Your password is empty";
	}
			if (f.password_2.value.length<1)
	{
		ret = false;
		err += "\nPlease confirm your password";
	}
				if (f.password_2.value!=f.password_1.value)
	{
		ret = false;
		err += "\Your password and its confirmation are different";
	}
	if (f.f_User_Email.value.length<1)
	{
		ret = false;
		err += "\nYour e-mail is empty";
	}

	if (f.f_User_Email.value!="")
	{
 		if((f.f_User_Email.value.search(/[A-Za-z 0-9_-]*@[A-Za-z0-9_-]*\.[A-Za-z0-9_-]*/gi) == -1)){
		ret = false;
		err += "\nCheck your e-mail address";
		}
	}
	if (ret)
	{
		return (true);
		f.submit();
		
	}
	else
	{
		alert (err);
		return (false);
	}
}