function doit(){
	var ajax1 = new sack();
	var form = document.getElementById('emailform');
	if (form.email.value == '') {
		alert("Please enter your email address");
		return false;
	}
	if (!form.email.value.match('@')) {
		alert("This does not appear to be a valid email address");
		return false;
	}
	ajax1.setVar("email", form.email.value); // recomended method of setting data to be parsed.
	ajax1.requestFile = "/lib/postit.php";
	ajax1.method = 'POST';
	ajax1.element = 'emailform_content';
	ajax1.runAJAX();
}