document.include = function (url) {
 if ('undefined' == typeof(url)) return false;

// for Mozilla
if (window.XMLHttpRequest) {
re = new XMLHttpRequest();
}
// for IE
else if (window.ActiveXObject) {
re = new ActiveXObject("Microsoft.XMLHTTP");
}

if (re!= null) {
re.open("GET",url,false);
re.send(null);
document.write(re.responseText);
}

}

document.include("/data.js");