function checkvalues () {

//check whether the field domain name is empty
if (document.domainregister.os0.value=="") {
alert ("Please insert a domain name");
document.domainregister.os0.focus
return false;
}
if (document.domainregister.os1.value == "" ){
alert ("Please insert a domain name extension\n.com / .co.uk / .net / .org / .biz / .infov");
document.domainregister.os1.focus ();
return false;
}
if (!document.domainregister.terms.checked ) {
alert ("please agree to our terms of service");
document.domainregister.terms.focus ();
return false;
}
return true;
}