// stores the reference to the XMLHttpRequest object
var xmlHttp = createXmlHttpRequestObject();
// retrieves the XMLHttpRequest object
function createXmlHttpRequestObject()
{
// will store the reference to the XMLHttpRequest object
var xmlHttp;
// if running Internet Explorer
if(window.ActiveXObject)
{
try
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
xmlHttp = false;
}
}
// if running Mozilla or other browsers
else
{
try
{
xmlHttp = new XMLHttpRequest();
}
catch (e)
{
xmlHttp = false;
}
}
// return the created object or display an error message
if (!xmlHttp)
alert("Error creating the XMLHttpRequest object.");
else
return xmlHttp;
}
// make asynchronous HTTP request using the XMLHttpRequest object
function process()
{
// proceed only if the xmlHttp object isn't busy
if (xmlHttp.readyState == 4 || xmlHttp.readyState == 0)
{
document.getElementById("divMessage").innerHTML = '<select name="name" disabled class="nform"><option value="">Загрузка...</option></select>';	
// retrieve the name typed by the user on the form
name = encodeURIComponent(document.getElementById("vendor").value);
// execute the model.php page from the server
xmlHttp.open("GET", "model.php?name=" + name, true);
// define the method to handle server responses
xmlHttp.onreadystatechange = handleServerResponse;
// make the server request
xmlHttp.send(null);
}
else
// if the connection is busy, try again after one second
setTimeout('process()', 1000);
}
// executed automatically when a message is received from the server
function handleServerResponse()
{
// move forward only if the transaction has completed
if (xmlHttp.readyState == 4)
{
// status of 200 indicates the transaction completed successfully
if (xmlHttp.status == 200)
{
// extract the XML retrieved from the server
xmlResponse = xmlHttp.responseXML;
// obtain the document element (the root element) of the XML structure
xmlDocumentElement = xmlResponse.documentElement;
// get the text message, which is in the first child of
// the the document element
helloMessage = xmlDocumentElement.firstChild.data;
// update the client display using the data received from the server	
var atxt = '<select name="name" class="nform">';
var temp = helloMessage.split('|');	
for (var i = 0; i < temp.length-1; i++ )
{	
if (temp[i] == '----------') atxt = atxt + '<option value="">' + temp[i] + '<\/option>';	   
else atxt = atxt + '<option value="' + temp[i] + '">' + temp[i] + '<\/option>';	 
}
atxt = atxt + "</select>";	

document.getElementById("divMessage").innerHTML = atxt;	


// restart sequence
//setTimeout('process()', 1000);
}
// a HTTP status different than 200 signals an error
else
{
alert("Ошибка доступа к серверу");
}
}
}