function checkForm(form)
{	
	if (form.username.value=="")
	{
		form.username.focus();
		alert("You must enter a first name");
		return(false);
	}
	
	if (form.emailaddress.value=="")
	{
		form.emailaddress.focus();
		alert("You must enter an email address");
		return(false);
	}

	if (/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/.test(form.emailaddress.value)){
	}
	else
	{
		form.emailaddress.focus();
		alert("You have entered an invalid email address")
		return (false)
	}
	
	return(true);
	
}