function checkForm(){
  if(document.form.user_name.value == ''){
    alert('Please tell us your name');
    document.form.user_name.focus();
    return false
  }
  
  if(document.form.company.value == ''){
    alert('Please tell us your Company name');
    document.form.company.focus();
    return false
  }  
   

if(document.form.email.value == ''){
    alert('Please tell us your Email address');
    document.form.email.focus();
    return false
  }
  
  if(document.form.phone.value == ''){
    alert('Please tell us your phone number');
    document.form.phone.focus();
    return false
  }
  
    if(document.form.address1.value == ''){
    alert('Please tell us your address');
    document.form.address1.focus();
    return false
  }
  if(document.form.country.value == ''){
    alert('Please tell us your Country');
    document.form.country.focus();
    return false
  }
  if(document.form.postcode.value == ''){
    alert('Please tell us your Postcode');
    document.form.postcode.focus();
    return false
  }
  return true
}