function createXMLHTTP() {
		try 
		{
		 ajax = new ActiveXObject("Microsoft.XMLHTTP");
		}
		 catch(e)
		 {
		  try
		     {
			  ajax = new ActiveXObject("Msxml2.XMLHTTP");
			  alert(ajax);
             }
			  catch(ex)
			  {
			   try
			  {
			   ajax = new XMLHttpRequest();
			  }
			   catch(exc)
			  {
			   alert("Esse browser não tem recursos para uso do Ajax");
			   ajax = null;
			  }
		}
         return ajax;
       }
	   	var arrSignatures = ["MSXML2.XMLHTTP.5.0", "MSXML2.XMLHTTP.4.0","MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP","Microsoft.XMLHTTP"];
            for (var i=0; i < arrSignatures.length; i++) {
			try {var oRequest = new ActiveXObject(arrSignatures[i]);
			return oRequest;
			} catch (oError) {
            }
            }
            throw new Error("MSXML is not installed on your system.");
            }
			function recuperarCarro(CarroFabricante)
            {
			
			// Criação do objeto XMLHTTP
            var oHTTPRequest = createXMLHTTP(); 
            oHTTPRequest.open("post", "lista_carros.asp", true);
            oHTTPRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
            oHTTPRequest.onreadystatechange=function() {
			if (oHTTPRequest.readyState==4){
            document.all.divCarros.innerHTML = oHTTPRequest.responseText;
            }
            }
            oHTTPRequest.send("cmbFabricante=" + CarroFabricante);
            }