?? ajax.js
字號:
// global variables to keep track of the request
// and the function to call when done
var ajaxreq=false, ajaxCallback;
// ajaxRequest: Sets up a request
function ajaxRequest(filename) {
try {
// Firefox / IE7 / Others
ajaxreq= new XMLHttpRequest();
} catch (error) {
try {
// IE 5 / IE 6
ajaxreq = new ActiveXObject("Microsoft.XMLHTTP");
} catch (error) {
return false;
}
}
ajaxreq.open("GET",filename);
ajaxreq.onreadystatechange = ajaxResponse;
ajaxreq.send(null);
}
// ajaxResponse: Waits for response and calls a function
function ajaxResponse() {
if (ajaxreq.readyState !=4) return;
if (ajaxreq.status==200) {
// if the request succeeded...
if (ajaxCallback) ajaxCallback();
} else alert("Request failed: " + ajaxreq.statusText);
return true;
}
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