Browsers provide an XMLHttpRequest object which can be used to make asynchronous HTTP requests from JavaScript by passing the 3rd parameter as true.
1 2 3 4 5 6 7 8 9 10 | function httpGetAsync(theUrl, callback) { var xmlHttpReq = new XMLHttpRequest(); xmlHttpReq.onreadystatechange = function() { if (xmlHttpReq.readyState == 4 && xmlHttpReq.status == 200) callback(xmlHttpReq.responseText); } xmlHttp.open("GET", theUrl, true); // true for asynchronous xmlHttp.send(null); } |
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