function validateForm(addform)
{


	if(""==document.forms.joinform.username.value)
	{
	alert("Please enter your username.");
	return false;
	}
	
	if(""==document.forms.joinform.firstname.value)
	{
	alert("Please enter your firstname.");
	return false;
	}

	if(""==document.forms.joinform.surname.value)
	{
	alert("Please enter your surname.");
	return false;
	}
	
	if(""==document.forms.joinform.email.value)
	{
	alert("Please enter your email.");
	return false;
	}

}