function check(obj) {
	obj.signingname.style.background="none";
	obj.signingemail.style.background="none";
	if (obj.signingname.value=="") {
		alert("Please enter your name.");
		obj.signingname.style.background="#ff0";
		obj.signingname.focus();
		return false;
	}
	if (obj.signingemail.value==""||obj.signingemail.value.indexOf("@")==-1) {
		alert("Please enter an email address.");
		obj.signingemail.style.background="#ff0";
		obj.signingemail.focus();
		return false;
	}
	var em=/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/;
	if (!em.test(obj.signingemail.value)) {
		alert("The email address entered is not valid.");
		obj.signingemail.style.background="#ff0";
		obj.signingemail.focus();
		obj.signingemail.select();
		return false;
	}
}