function checkForm()
{	
	var myForm = document.consultationForm;
	var errMsg = "";
	
	if(myForm.firstname.value == "")
		errMsg += "You must select a first name.\n";
		
	if(myForm.surname.value == "")
		errMsg += "You must enter a surname.\n";		
	
	if(myForm.email.value == "")
		errMsg += "You must enter an email address.\n";
		
	if(errMsg == "")
	{	
		myForm.submit();
	}
	else
	{	
		alert(errMsg);		
	}
}