function loadselect(autoid){
  ajax_cmb=nuevoAjax();
  ajax_cmb.open("GET","showItems.php?cat="+autoid, true);
  ajax_cmb.onreadystatechange=function(){
      if (ajax_cmb.readyState==4){
        document.getElementById("selectversion").innerHTML=ajax_cmb.responseText;
      }
  }
  ajax_cmb.send(null);
}



function loadselect2(autoid){
  ajax_cmb=nuevoAjax();
  ajax_cmb.open("GET","showItems2.php?cat="+autoid, true);
  ajax_cmb.onreadystatechange=function(){
      if (ajax_cmb.readyState==4){
        document.getElementById("valorautomovil").value=ajax_cmb.responseText;
      }
  }
  ajax_cmb.send(null);
}



var xmlHttp

function nuevoAjax(){
   var xmlhttp=false;
   try{
      xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
   }catch(e){
      try {
          xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
      }catch(E){
      xmlhttp = false;
      }
   }if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
      xmlhttp = new XMLHttpRequest();
   }

   return xmlhttp;
}