function checkEmail(fieldName, req){
	var	formField = document.getElementById(fieldName);
	//debugging
	if(!formField){
		alert("checkEmail: The field with id '" +fieldName +"' doesn't exist");
		return false;
	}
	var regexp =  /^[^ ]+@[^ ]{2,}\.[^ ]{2,}$/;  //matches thesse chars [- +()0-9] at least 9 chars long
	if (!formField.value && req != false){
		alert("Please enter an email address");
		return false;
		
	}else if(formField.value && !formField.value.match(regexp)) {
		alert("Please enter a valid email address e.g. 'mrfogg@mrfogg.co.uk'.");
		return false;
	}else{
		document.mailingListForm.submit();
	}
}