can't call the servlet using AJAX

[sk]

I create some javascript to send some search request.
However, on some machines i wont' be able to send
request. What could be the reason?

function sendSearchRequest()
{
var srch_url = "/servlet/Search";
try {
request = new XMLHttpRequest();
} catch (trymicrosoft) {
try {
request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (othermicrosoft) {
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed) {
request = null;
}
}
}

request.open('GET', srch_url , true );
request.onreadystatechange = GetSearchResponse;
request.send(null);
}

function GetSearchResponse()
{}

 

[Randy Webb]

sk said the following on 7/18/2006 6:34 PM:

I create some javascript to send some search request.
However, on some machines i wont' be able to send
request. What could be the reason?

Several.

The browser doesn't support the HTTPRequest Object.
The browser doesn't allow ActiveX.
You are using limited HTTPRequest code.

function sendSearchRequest()
{
var srch_url = "/servlet/Search";
try {
request = new XMLHttpRequest();
} catch (trymicrosoft) {
try {
request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (othermicrosoft) {
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed) {
request = null;

If the browser doesn't support Msml2.XMLHTTP or Microsoft.XMLHTTP then
your code fails silently. There are MSIE's with other versions of
XMLHTTP support and no non-IE browser supports your code.