function checkForm0() {
if (document.forms.Form0.elements['firstName'].value.length == 0) {
    alert('Please enter a value for the "First Name" field');
    return false;
}
if (document.forms.Form0.elements['lastName'].value.length == 0) {
    alert('Please enter a value for the "Last Name" field');
    return false;
}
if (document.forms.Form0.elements['email'].value.length == 0) {
    alert('Please enter a value for the "Your email address" field');
    return false;
}
if (document.forms.Form0.elements['jobTitle'].value.length == 0) {
    alert('Please enter a value for the "Job Title" field');
    return false;
}
if (document.forms.Form0.elements['company'].value.length == 0) {
    alert('Please enter a value for the "Company" field');
    return false;
}
if (document.forms.Form0.elements['phone'].value.length == 0) {
    alert('Please enter a value for the "Phone" field');
    return false;
}
  return true;
}