function searchCard(){
  
  province = document.getElementById('province').value;  
  city = document.getElementById('city').value;
  weight = document.getElementById('weight').value;
    
  if ( province.length > 0 && city.length > 0 && 
       weight.length > 0 && is_numeric(weight) )  
        document.searchForm.submit();        
}

function is_numeric( mixed_var ) {
    if (mixed_var === '') {
        return false;
    }

    return !isNaN(mixed_var * 1);
}

function submitContact(){
  document.contactForm.submit();
}