3 function openXMLHttpRequest() {
4 if( window.XMLHttpRequest ) {
5 return new XMLHttpRequest();
6 } else if( window.ActiveXObject && navigator.platform != 'MacPPC' ) {
7 // IE/Mac has an ActiveXObject but it doesn't work.
8 return new ActiveXObject("Microsoft.XMLHTTP");
15 * Returns true if could open the request,
16 * false otherwise (eg no browser support).
18 function livePreview(target, text, postUrl) {
21 window.alert('Live preview failed!\nTry normal preview.');
22 var fallback = document.getElementById('wpPreview');
23 if ( fallback ) { fallback.style.display = 'inline'; }
25 prevReq = openXMLHttpRequest();
26 if( !prevReq ) return false;
28 prevReq.onreadystatechange = updatePreviewText;
29 prevReq.open("POST", postUrl, true);
31 var postData = 'wpTextbox1=' + encodeURIComponent(text);
32 prevReq.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
33 prevReq.send(postData);
37 function updatePreviewText() {
38 if( prevReq.readyState != 4 ) {
41 if( prevReq.status != 200 ) {
42 window.alert('Failed to connect: ' + prevReq.status +
43 ' "' + prevReq.statusText + '"');
44 var fallback = document.getElementById('wpPreview');
45 if ( fallback ) { fallback.style.display = 'inline'; }
48 prevTarget.innerHTML = prevReq.responseText;
50 /* Hide the active diff if it exists */
51 var diff = document.getElementById('wikiDiff');
52 if ( diff ) { diff.style.display = 'none'; }