function getStreets(street)
{
  var city=document.getElementById('city');
  var type=document.getElementById('type');
  
  cityValue=city.options[city.selectedIndex].value;
  typeValue=type.options[type.selectedIndex].value;
  
  $('#streets').load('streets.php?city='+cityValue.replace(' ','%20')+'&type='+typeValue+'&street='+street);
}