function validateSubscriptionData(form, email_err_msg)
{
	valid_email = /^[\w_\.\-\+]+@([\w\-]+\.)+[a-z]{2,6}$/i;
	
	for(var i=0;i<form.elements.length;i++)
	{
		var el = form.elements[i];
	    if(el.name == 'email' && !el.value.match(valid_email))
	    {
	    	alert(email_err_msg);
	    	return false;
	    }
	}
}