function getXMLHttpRequest() { var self = arguments.callee; if (!self.XMLHttpRequest) { var tryThese = [ function () { return new XMLHttpRequest(); }, function () { return new ActiveXObject('Msxml2.XMLHTTP'); }, function () { return new ActiveXObject('Microsoft.XMLHTTP'); }, function () { return new ActiveXObject('Msxml2.XMLHTTP.4.0'); }, function () { throw new MochiKit.Async.BrowserComplianceError("Browser does not support XMLHttpRequest"); } ]; for (var i = 0; i < tryThese.length; i++) { var func = tryThese[i]; try { self.XMLHttpRequest = func; return func(); } catch (e) { // pass } } } return self.XMLHttpRequest();}