AJAX call program from another server

[syok90]

i'm doing a lot of AJAX PROGRAM in my website
1. madads.myadsworld.com
2. eshop.myadsworld.com
3. syokchat.myadsworld.com

i just want to ask:
can i call my php program from another server.normal way getjumrek.php program is in same server. Can i write var gettxt = http://192.168.1.40/getjumrek.php (this case current server is 192.168.1.41 but there is also getjumrek.php in 192.168.1.40)

example

var gettxt = "getjumrek.php";
var httpReceive5Txt = getHTTPObject();
function receivetxt() {
    //alert('aa');
    if (httpReceiveTxt.readyState == 4 || httpReceiveTxt.readyState == 0) {
      httpReceiveTxt.open("GET",GetTxt + '?lastkey=' + lastkey, true);
    httpReceiveTxt.onreadystatechange = handlehHttpReceiveTxt;
    httpReceiveTxt.send(null);
    }
}
 
 
 
//deals with the servers' reply to requesting new content
function handlehHttpReceiveTxt() {
}
 
getHTTPObject() {}

[phvfl]

Standard AJAX calls can not be cross domain, so you can only call to the same server.