AJAX and PHP

Chapter 3}}// continue only if HTTP status is "OK"if (xmlHttp.status == 200){try{// do something with the response from the serverhandleServerResponse();}catch(e){// display error messagealert("Error reading the response: " + e.toString());}}else{// display status messagealert("There was a problem retrieving the data:\n" +xmlHttp.statusText);}// handles the response received from the serverfunction handleServerResponse(){// retrieve the server's responsevar response = xmlHttp.responseText;// obtain a reference to the element on the pagemyDiv = document.getElementById('myDivElement');// display the HTML outputmyDiv.innerHTML = "New random number retrieved from server: "+ response + "";}4. Load http://localhost/ajax/foundations/ping/ping.html. If you are usingInternet Explorer with the default options, you will be asked whether you will allowthe script to connect to a remote server as shown in Figure 3.8. If you are usingFirefox or Opera with the default options, you will get security errors like the onesshown in Figure 3.9 and Figure 3.10, respectively.Figure 3.8: Internet Explorer Asking for PermissionFigure 3.9: Firefox Denying Access83