function makes_change(prefix)
  {
	return; 
  var modelsel = document.getElementById(prefix+"models");
  var makesel = document.getElementById(prefix+"makes");
  if(modelsel)
    { var model = parseInt(modelsel.options[modelsel.selectedIndex].value); }
  if(makesel)
    { var make = parseInt(makesel.options[makesel.selectedIndex].value); }
  var yearsel = document.getElementById(prefix+"years");
  if(yearsel)
    { var year = parseInt(yearsel.options[yearsel.selectedIndex].value); }
  
  if(modelsel) { xajax_model_options(make,model,prefix); }
  if(yearsel) { xajax_year_options(year,make,model,prefix); }
  }//end makes_change

function models_change(prefix)
  {
	 return;
  var modelsel = document.getElementById(prefix+"models");
  var makesel = document.getElementById(prefix+"makes");
  var yearsel = document.getElementById(prefix+"years");
  if(modelsel)
    { var model = parseInt(modelsel.options[modelsel.selectedIndex].value); }
  if(makesel)
    { var make = parseInt(makesel.options[makesel.selectedIndex].value); }
  if(yearsel)
    {
    var year = parseInt(yearsel.options[yearsel.selectedIndex].value);
    xajax_year_options(year,make,model,prefix);
    }
  }//end models_change