1). Place the file client.html and xda.js on the serverA.

2). Place the file server.html on the serverB.

3). Declare xda.js in the main page.

<script type="text/javascript" src="xda.js"></script>

4). Create JS function which performs cross domain call as in the following example:

<script type="text/javascript">                                                                                                                                                                                                                                                  
  function test(){                                                                                                                                       
                var facade = xdaInit();                                                                                                                  
                facade.clientURI = "http://localhost/cross-domain-ajax/client/client.html";                                                              
                facade.serverURI = "http://localhost:8080/cross-domain-ajax/server/server.html";                                                         
                facade.apiURI = "http://localhost:8080/cross-domain-ajax/server/test.txt";                                                               
                facade.method = "POST";                                                                                                                  
                facade.load = function(result) {                                                                                                         
                                alert(result.responseText);                                                                                              
                }                                                                                                                                        
                facade.setRequestHeader("keep-alive","200");                                                                                             
                xda.create(facade);                                                                                                                      
        }                                                                                                                                                
</script>

5). Use this function (here it is bound to a button's onclick event).

<button onclick='test()'>test cross-domain</button>