var errormsg = '';
function ValidateEmail(emailobj) {
	var isvalid = true;
	var email=/^[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*@[A-Za-z0-9]+([_\.-][A-Za-z0-9]+)*\.([A-Za-z]){2,4}$/i;
	isvalid = email.test(emailobj.value);
	if (!isvalid) {
		errormsg = 'Please enter a valid email address.';
		emailobj.value = '';
		emailobj.focus();
	}
	return(isvalid);
}
function Check4Length(obj) {
	if (obj.value.length) {
		return true;
	} else {
		errormsg = 'Please enter your name.';
		obj.focus();
		return false;
	}
}
function checkForm(formobj) {
	var ok2go = false;
	errormsg = '';
	ok2go = Check4Length(formobj.name) && ValidateEmail(formobj.email);
	if (!ok2go && errormsg.length) { alert (errormsg);
	}
	//alert (ok2go);
	return ok2go;
}