The W3C recommendation for scripting a HTTP connection without reloading the entire page. A similar but less vapourwarish technology is Microsoft's XMLHttpRequest; it has the advantage of actually being implemented in most modern browsers (IE, Mozilla, Opera).
DOM Load and Save is currently only implemented in Opera 7.6 and above.
Derived from molily:
if (document.implementation.hasFeature("LS", "3.0")) {
var parser = document.implementation.createLSParser(
document.implementation.MODE_SYNCHRONOUS,
'http://www.w3.org/TR/REC-xml');
try {
var doc = parser.parseURI("testdata.html");
window.alert(doc.getElementsByTagName("title")[0].childNodes[0].nodeValue); // reads the title of the page; not quite clean!
} catch(e) {
window.alert("Could not load data: code " + e.code);
}
} else {
window.alert("DOM load&save not supported!");
}