function validate_form ()
{
    valid = true;

    if ( document.register_form.first_name.value == "" )
    {
        alert ( "Please enter a first name" );
        valid = false;
    }
 if ( document.register_form.last_name.value == "" )
    {
        alert ( "Please enter a last name" );
        valid = false;
    }
     if ( document.register_form.house_no.value == "" )
    {
        alert ( "Please enter an email address" );
        valid = false;
    }
     if ( document.register_form.street_name.value == "" )
    {
        alert ( "Please enter a job title" );
        valid = false;
    }
     if ( document.register_form.town.value == "" )
    {
        alert ( "Please enter a company" );
        valid = false;
    }
     if ( document.register_form.county.value == "" )
    {
        alert ( "Please enter address line 1" );
        valid = false;
    }
     if ( document.register_form.password2.value == "" )
    {
        alert ( "Please confirm password" );
        valid = false;
    }
     if ( document.register_form.postcode.value == "" )
    {
        alert ( "Please enter a postcode" );
        valid = false;
    }
     if ( document.register_form.username.value == "" )
    {
        alert ( "Please enter a username" );
        valid = false;
    }
     if ( document.register_form.password1.value == "" )
    {
        alert ( "Please enter a password" );
        valid = false;
    }
     if ( document.register_form.terms.value == "" )
    {
        alert ( "Please accept our terms and conditions" );
        valid = false;
    }
    if ( document.register_form.country.value == "" )
    {
        alert ( "Please select a country" );
        valid = false;
    }
    
    
    return valid;
}