var http_request = false; function makeRequest(url) { http_request = false; if (window.XMLHttpRequest) { http_request = new XMLHttpRequest(); if (http_request.overrideMimeType) { http_request.overrideMimeType('text/xml');}
} else if (window.ActiveXObject) { try { http_request = new ActiveXObject("Msxml2.XMLHTTP");} catch (e) { try { http_request = new ActiveXObject("Microsoft.XMLHTTP");} catch (e) {}
}
}
if (!http_request) { alert('Giving up :( Cannot create an XMLHTTP instance'); return false;}
http_request.onreadystatechange = onResponse; http_request.open('GET', url, true); http_request.send(null);}