]> git.wh0rd.org - tt-rss.git/blobdiff - prefs.js
infobox-based feed category editor
[tt-rss.git] / prefs.js
index 921eb0c4477237cf916679f96143de5edc0a5c01..d9c10d692bf43608f0dc044d0511d9b20ec7290a 100644 (file)
--- a/prefs.js
+++ b/prefs.js
@@ -1,7 +1,6 @@
 var xmlhttp = false;
 
 var active_feed_cat = false;
-var active_filter = false;
 var active_label = false;
 var active_tab = false;
 var feed_to_expand = false;
@@ -11,6 +10,8 @@ var piggie_fwd = true;
 
 var xmlhttp = Ajax.getTransport();
 
+var init_params = new Array();
+
 function expand_feed_callback() {
        if (xmlhttp.readyState == 4) {
                try {   
@@ -54,22 +55,7 @@ function feedlist_callback() {
 function filterlist_callback() {
        var container = document.getElementById('prefContent');
        if (xmlhttp.readyState == 4) {
-
                container.innerHTML=xmlhttp.responseText;
-
-               if (active_filter) {
-                       var row = document.getElementById("FILRR-" + active_filter);
-                       if (row) {
-                               if (!row.className.match("Selected")) {
-                                       row.className = row.className + "Selected";
-                               }               
-                       }
-                       var checkbox = document.getElementById("FICHK-" + active_filter);
-                       
-                       if (checkbox) {
-                               checkbox.checked = true;
-                       }
-               }
                notify("");
        }
 }
@@ -77,8 +63,8 @@ function filterlist_callback() {
 function labellist_callback() {
        var container = document.getElementById('prefContent');
        if (xmlhttp.readyState == 4) {
+               closeInfoBox();
                container.innerHTML=xmlhttp.responseText;
-
                if (active_label) {
                        var row = document.getElementById("LILRR-" + active_label);
                        if (row) {
@@ -96,6 +82,14 @@ function labellist_callback() {
        }
 }
 
+function labeltest_callback() {
+       var container = document.getElementById('label_test_result');
+       if (xmlhttp.readyState == 4) {
+               container.innerHTML=xmlhttp.responseText;
+               notify("");
+       }
+}
+
 function feed_browser_callback() {
        var container = document.getElementById('prefContent');
        if (xmlhttp.readyState == 4) {
@@ -163,7 +157,7 @@ function updateFeedList(sort_key) {
 
 }
 
-function updateUsersList() {
+function updateUsersList(sort_key) {
 
        if (!xmlhttp_ready(xmlhttp)) {
                printLockingError();
@@ -174,7 +168,8 @@ function updateUsersList() {
 
 //     p_notify("Loading, please wait...");
 
-       xmlhttp.open("GET", "backend.php?op=pref-users", true);
+       xmlhttp.open("GET", "backend.php?op=pref-users&sort="
+               + param_escape(sort_key), true);
        xmlhttp.onreadystatechange=userlist_callback;
        xmlhttp.send(null);
 
@@ -187,55 +182,26 @@ function addLabel() {
                return
        }
 
-       var sqlexp = document.getElementById("ladd_expr");
-
-       if (sqlexp.value.length == 0) {
-               alert("Can't add label: missing SQL expression.");
-       } else {
-               notify("Adding label...");
+       var form = document.forms['label_edit_form'];
 
-               xmlhttp.open("GET", "backend.php?op=pref-labels&subop=add&exp=" +
-                       param_escape(sqlexp.value), true);                      
-                       
-               xmlhttp.onreadystatechange=labellist_callback;
-               xmlhttp.send(null);
+       var sql_exp = form.sql_exp.value;
+       var description = form.description.value;
 
-               sqlexp.value = "";
+       if (sql_exp == "") {
+               alert("Can't create label: missing SQL expression.");
+               return false;
        }
 
-}
-
-function addFilter() {
-
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
+       if (description == "") {
+               alert("Can't create label: missing caption.");
+               return false;
        }
 
-       var regexp = document.getElementById("fadd_regexp");
-       var match = document.getElementById("fadd_match");
-       var feed = document.getElementById("fadd_feed");
-       var action = document.getElementById("fadd_action");
-
-       if (regexp.value.length == 0) {
-               alert("Can't add filter: missing filter expression.");
-       } else {
-               notify("Adding filter...");
-
-               var v_match = match[match.selectedIndex].text;
-               var feed_id = feed[feed.selectedIndex].id;
-               var action_id = action[action.selectedIndex].id;
-
-               xmlhttp.open("GET", "backend.php?op=pref-filters&subop=add&regexp=" +
-                       param_escape(regexp.value) + "&match=" + v_match +
-                       "&fid=" + param_escape(feed_id) + "&aid=" + param_escape(action_id), true);
-                       
-               xmlhttp.onreadystatechange=filterlist_callback;
-               xmlhttp.send(null);
-
-               regexp.value = "";
-       }
+       var query = Form.serialize("label_edit_form");
 
+       xmlhttp.open("GET", "backend.php?op=pref-labels&subop=add&" + query, true);                     
+       xmlhttp.onreadystatechange=infobox_submit_callback;
+       xmlhttp.send(null);
 }
 
 function addFeed() {
@@ -254,7 +220,7 @@ function addFeed() {
        } else {
                notify("Adding feed...");
 
-               xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=add&link=" +
+               xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=add&feed_url=" +
                        param_escape(link.value), true);
                xmlhttp.onreadystatechange=feedlist_callback;
                xmlhttp.send(null);
@@ -279,9 +245,9 @@ function addFeedCat() {
        } else {
                notify("Adding feed category...");
 
-               xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=addCat&cat=" +
+               xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=editCats&action=add&cat=" +
                        param_escape(cat.value), true);
-               xmlhttp.onreadystatechange=feedlist_callback;
+               xmlhttp.onreadystatechange=infobox_callback;
                xmlhttp.send(null);
 
                link.value = "";
@@ -321,11 +287,16 @@ function editLabel(id) {
                return
        }
 
+       document.getElementById("label_create_btn").disabled = true;
+
        active_label = id;
 
+       selectTableRowsByIdPrefix('prefLabelList', 'LILRR-', 'LICHK-', false);
+       selectTableRowById('LILRR-'+id, 'LICHK-'+id, true);
+
        xmlhttp.open("GET", "backend.php?op=pref-labels&subop=edit&id=" +
                param_escape(id), true);
-       xmlhttp.onreadystatechange=labellist_callback;
+       xmlhttp.onreadystatechange=infobox_callback;
        xmlhttp.send(null);
 
 }
@@ -354,13 +325,14 @@ function editFilter(id) {
                return
        }
 
-       active_filter = id;
+       document.getElementById("create_filter_btn").disabled = true;
 
-       xmlhttp.open("GET", "backend.php?op=pref-filters&subop=edit&id=" +
-               param_escape(id), true);
-       xmlhttp.onreadystatechange=filterlist_callback;
-       xmlhttp.send(null);
+       selectTableRowsByIdPrefix('prefFilterList', 'FILRR-', 'FICHK-', false);
+       selectTableRowById('FILRR-'+id, 'FICHK-'+id, true);
 
+       xmlhttp.open("GET", "backend.php?op=pref-filters&subop=edit&id=" + param_escape(id), true);
+       xmlhttp.onreadystatechange=infobox_callback;
+       xmlhttp.send(null);
 }
 
 function editFeed(feed) {
@@ -393,9 +365,9 @@ function editFeedCat(cat) {
 
        active_feed_cat = cat;
 
-       xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=editCat&id=" +
+       xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=editCats&action=edit&id=" +
                param_escape(cat), true);
-       xmlhttp.onreadystatechange=feedlist_callback;
+       xmlhttp.onreadystatechange=infobox_callback;
        xmlhttp.send(null);
 
 }
@@ -467,6 +439,8 @@ function removeSelectedLabels() {
        } else {
                alert("No labels are selected.");
        }
+
+       return false;
 }
 
 function removeSelectedUsers() {
@@ -494,6 +468,8 @@ function removeSelectedUsers() {
        } else {
                alert("No users are selected.");
        }
+
+       return false;
 }
 
 function removeSelectedFilters() {
@@ -520,6 +496,8 @@ function removeSelectedFilters() {
        } else {
                alert("No filters are selected.");
        }
+
+       return false;
 }
 
 
@@ -551,7 +529,8 @@ function removeSelectedFeeds() {
                alert("No feeds are selected.");
 
        }
-
+       
+       return false;
 }
 
 function removeSelectedFeedCats() {
@@ -570,9 +549,9 @@ function removeSelectedFeedCats() {
                if (ok) {
                        notify("Removing selected categories...");
        
-                       xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=removeCats&ids="+
+                       xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=editCats&action=remove&ids="+
                                param_escape(sel_rows.toString()), true);
-                       xmlhttp.onreadystatechange=feedlist_callback;
+                       xmlhttp.onreadystatechange=infobox_callback;
                        xmlhttp.send(null);
                }
 
@@ -582,6 +561,7 @@ function removeSelectedFeedCats() {
 
        }
 
+       return false;
 }
 
 function feedEditCancel() {
@@ -595,6 +575,7 @@ function feedEditCancel() {
 
        selectPrefRows('feed', false); // cleanup feed selection
 
+       return false;
 }
 
 function feedCatEditCancel() {
@@ -608,10 +589,11 @@ function feedCatEditCancel() {
 
 //     notify("Operation cancelled.");
 
-       xmlhttp.open("GET", "backend.php?op=pref-feeds", true);
-       xmlhttp.onreadystatechange=feedlist_callback;
+       xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=editCats", true);
+       xmlhttp.onreadystatechange=infobox_callback;
        xmlhttp.send(null);
 
+       return false;
 }
 
 function feedEditSave() {
@@ -634,6 +616,8 @@ function feedEditSave() {
                xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
                xmlhttp.send(query);
 
+               closeInfoBox();
+
                return false;
 
        } catch (e) {
@@ -653,16 +637,21 @@ function feedCatEditSave() {
        var query = Form.serialize("feed_cat_edit_form");
 
        xmlhttp.open("GET", "backend.php?" + query, true);
-       xmlhttp.onreadystatechange=feedlist_callback;
+       xmlhttp.onreadystatechange=infobox_callback;
        xmlhttp.send(null);
 
        active_feed_cat = false;
 
+       return false;
 }
 
 
 function labelTest() {
 
+       var container = document.getElementById('label_test_result');
+       container.style.display = "block";
+       container.innerHTML = "<p>Loading, please wait...</p>";
+
        var form = document.forms['label_edit_form'];
 
        var sql_exp = form.sql_exp.value;
@@ -671,9 +660,10 @@ function labelTest() {
        xmlhttp.open("GET", "backend.php?op=pref-labels&subop=test&expr=" +
                param_escape(sql_exp) + "&descr=" + param_escape(description), true);
 
-       xmlhttp.onreadystatechange=infobox_callback;
+       xmlhttp.onreadystatechange=labeltest_callback;
        xmlhttp.send(null);
 
+       return false;
 }
 
 function displayHelpInfobox(topic_id) {
@@ -693,14 +683,14 @@ function labelEditCancel() {
                return
        }
 
-       active_label = false;
+       document.getElementById("label_create_btn").disabled = false;
 
-//     notify("Operation cancelled.");
+       active_label = false;
 
-       xmlhttp.open("GET", "backend.php?op=pref-labels", true);
-       xmlhttp.onreadystatechange=labellist_callback;
-       xmlhttp.send(null);
+       selectPrefRows('label', false); // cleanup feed selection
+       closeInfoBox();
 
+       return false;
 }
 
 function userEditCancel() {
@@ -711,8 +701,9 @@ function userEditCancel() {
        }
 
        selectPrefRows('user', false); // cleanup feed selection
-
        closeInfoBox();
+
+       return false;
 }
 
 function filterEditCancel() {
@@ -722,14 +713,12 @@ function filterEditCancel() {
                return
        }
 
-       active_filter = false;
-
-//     notify("Operation cancelled.");
-
-       xmlhttp.open("GET", "backend.php?op=pref-filters", true);
-       xmlhttp.onreadystatechange=filterlist_callback;
-       xmlhttp.send(null);
+       document.getElementById("create_filter_btn").disabled = false;
+       
+       selectPrefRows('filter', false); // cleanup feed selection
+       closeInfoBox();
 
+       return false;
 }
 
 function labelEditSave() {
@@ -741,18 +730,23 @@ function labelEditSave() {
                return
        }
 
-       var sql_exp = document.forms["label_edit_form"].sql_exp.value;
-       var description = document.forms["label_edit_form"].description.value;
+/*     if (!is_opera()) {
 
-       if (sql_exp.length == 0) {
-               alert("SQL Expression cannot be blank.");
-               return;
-       }
+               var sql_exp = document.forms["label_edit_form"].sql_exp.value;
+               var description = document.forms["label_edit_form"].description.value;
+       
+               if (sql_exp.length == 0) {
+                       alert("SQL Expression cannot be blank.");
+                       return false;
+               }
+       
+               if (description.length == 0) {
+                       alert("Caption field cannot be blank.");
+                       return false;
+               }
+       } */
 
-       if (description.length == 0) {
-               alert("Caption field cannot be blank.");
-               return;
-       }
+       closeInfoBox();
 
        notify("Saving label...");
 
@@ -760,11 +754,11 @@ function labelEditSave() {
 
        query = Form.serialize("label_edit_form");
 
-       xmlhttp.open("GET", "backend.php?" + query, true);
-               
+       xmlhttp.open("GET", "backend.php?" + query, true);              
        xmlhttp.onreadystatechange=labellist_callback;
        xmlhttp.send(null);
 
+       return false;
 }
 
 function userEditSave() {
@@ -782,12 +776,16 @@ function userEditSave() {
        }
        
        notify("Saving user...");
-       
+
+       closeInfoBox();
+
        var query = Form.serialize("user_edit_form");
        
        xmlhttp.open("GET", "backend.php?" + query, true);                      
        xmlhttp.onreadystatechange=userlist_callback;
        xmlhttp.send(null);
+
+       return false;
 }
 
 
@@ -798,23 +796,28 @@ function filterEditSave() {
                return
        }
 
-       var reg_exp = document.forms["filter_edit_form"].reg_exp.value;
-
-       if (reg_exp.length == 0) {
-               alert("Filter expression field cannot be blank.");
-               return;
-       }
+/*     if (!is_opera()) {
+               var reg_exp = document.forms["filter_edit_form"].reg_exp.value;
+       
+               if (reg_exp.length == 0) {
+                       alert("Filter expression field cannot be blank.");
+                       return;
+               }
+       } */
 
        notify("Saving filter...");
 
-       active_filter = false;
-
        var query = Form.serialize("filter_edit_form");
 
+       closeInfoBox();
+
+       document.getElementById("create_filter_btn").disabled = false;
+
        xmlhttp.open("GET", "backend.php?" + query, true);
        xmlhttp.onreadystatechange=filterlist_callback;
        xmlhttp.send(null);
 
+       return false;
 }
 
 function editSelectedLabel() {
@@ -1046,6 +1049,7 @@ function piggie2_callback() {
 
 function localPiggieFunction(enable) {
        if (enable) {
+               debug("I LOVEDED IT!");
                var piggie = document.getElementById("piggie");
                piggie.style.display = "block";
 
@@ -1069,7 +1073,7 @@ function validateOpmlImport() {
        }
 }
 
-function updateFilterList() {
+function updateFilterList(sort_key) {
 
        if (!xmlhttp_ready(xmlhttp)) {
                printLockingError();
@@ -1080,13 +1084,14 @@ function updateFilterList() {
 
 //     p_notify("Loading, please wait...");
 
-       xmlhttp.open("GET", "backend.php?op=pref-filters", true);
+       xmlhttp.open("GET", "backend.php?op=pref-filters&sort=" + 
+               param_escape(sort_key), true);
        xmlhttp.onreadystatechange=filterlist_callback;
        xmlhttp.send(null);
 
 }
 
-function updateLabelList() {
+function updateLabelList(sort_key) {
 
        if (!xmlhttp_ready(xmlhttp)) {
                printLockingError();
@@ -1097,7 +1102,8 @@ function updateLabelList() {
 
 //     document.getElementById("prefContent").innerHTML = "Loading labels, please wait...";
 
-       xmlhttp.open("GET", "backend.php?op=pref-labels", true);
+       xmlhttp.open("GET", "backend.php?op=pref-labels&sort=" + 
+               param_escape(sort_key), true);
        xmlhttp.onreadystatechange=labellist_callback;
        xmlhttp.send(null);
 }
@@ -1121,55 +1127,136 @@ function selectTab(id, noupdate) {
 
 //     alert(id);
 
-       if (!xmlhttp_ready(xmlhttp)) {
-               printLockingError();
-               return
-       }
+       if (!id) id = active_tab;
 
-       if (!noupdate) {
+       try {
 
-               notify("Loading, please wait...", true);
+               if (!xmlhttp_ready(xmlhttp)) {
+                       printLockingError();
+                       return
+               }
 
-               // clean up all current selections, just in case
-               active_feed_cat = false;
-               active_filter = false;
-               active_label = false;
+               if (!noupdate) {
 
-               if (id == "feedConfig") {
-                       updateFeedList();
-               } else if (id == "filterConfig") {
-                       updateFilterList();
-               } else if (id == "labelConfig") {
-                       updateLabelList();
-               } else if (id == "genConfig") {
-                       updatePrefsList();
-               } else if (id == "userConfig") {
-                       updateUsersList();
-               } else if (id == "feedBrowser") {
-                       updateBigFeedBrowser();
+                       debug("selectTab: " + id + "(NU: " + noupdate + ")");
+       
+//                     notify("Loading, please wait...", true);
+       
+                       // close active infobox if needed
+                       closeInfoBox();
+       
+                       // clean up all current selections, just in case
+                       active_feed_cat = false;
+                       active_label = false;
+       
+                       if (id == "feedConfig") {
+                               updateFeedList();
+                       } else if (id == "filterConfig") {
+                               updateFilterList();
+                       } else if (id == "labelConfig") {
+                               updateLabelList();
+                       } else if (id == "genConfig") {
+                               updatePrefsList();
+                       } else if (id == "userConfig") {
+                               updateUsersList();
+                       } else if (id == "feedBrowser") {
+                               updateBigFeedBrowser();
+                       }
+               }
+       
+               var tab = document.getElementById(active_tab + "Tab");
+       
+               if (tab) {
+                       if (tab.className.match("Selected")) {
+                               tab.className = "prefsTab";
+                       }
                }
+       
+               tab = document.getElementById(id + "Tab");
+       
+               if (tab) {
+                       if (!tab.className.match("Selected")) {
+                               tab.className = tab.className + "Selected";
+                       }
+               }
+       
+               if (active_tab != id) {
+                       storeInitParam("prefs_active_tab", id);
+               }
+       
+               active_tab = id;
+
+       } catch (e) {
+               exception_error("selectTab", e);
        }
+}
 
-       var tab = document.getElementById(active_tab + "Tab");
+function backend_sanity_check_callback() {
 
-       if (tab) {
-               if (tab.className.match("Selected")) {
-                       tab.className = "prefsTab";
-               }
-       }
+       if (xmlhttp.readyState == 4) {
 
-       tab = document.getElementById(id + "Tab");
+               try {
+               
+                       if (!xmlhttp.responseXML) {
+                               fatalError(3, "[D001, Received reply is not XML]: " + xmlhttp.responseText);
+                               return;
+                       }
+       
+                       var reply = xmlhttp.responseXML.firstChild.firstChild;
+       
+                       if (!reply) {
+                               fatalError(3, "[D002, Invalid RPC reply]: " + xmlhttp.responseText);
+                               return;
+                       }
+       
+                       var error_code = reply.getAttribute("error-code");
+               
+                       if (error_code && error_code != 0) {
+                               return fatalError(error_code, reply.getAttribute("error-msg"));
+                       }
+       
+                       debug("sanity check ok");
+
+                       var params = reply.nextSibling;
 
-       if (tab) {
-               if (!tab.className.match("Selected")) {
-                       tab.className = tab.className + "Selected";
+                       if (params) {
+                               debug('reading init-params...');
+                               var param = params.firstChild;
+
+                               while (param) {
+                                       var k = param.getAttribute("key");
+                                       var v = param.getAttribute("value");
+                                       debug(k + " => " + v);
+                                       init_params[k] = v;                                     
+                                       param = param.nextSibling;
+                               }
+                       }
+
+                       init_second_stage();
+
+               } catch (e) {
+                       exception_error("backend_sanity_check_callback", e);
                }
-       }
+       } 
+}
 
-       active_tab = id;
+function init_second_stage() {
 
-       setCookie('ttrss_pref_acttab', active_tab);
+       try {
+               active_tab = getInitParam("prefs_active_tab");
+               if (!active_tab) active_tab = "genConfig";
+
+               document.onkeydown = pref_hotkey_handler;
 
+               if (navigator.userAgent.match("Opera")) {       
+                       setTimeout("selectTab()", 500);
+               } else {
+                       selectTab(active_tab);
+               }
+               notify("");
+       } catch (e) {
+               exception_error("init_second_stage", e);
+       }
 }
 
 function init() {
@@ -1179,6 +1266,11 @@ function init() {
                if (arguments.callee.done) return;
                arguments.callee.done = true;           
 
+               if (getURLParam('debug')) {
+                       document.getElementById('debug_output').style.display = 'block';
+                       debug('debug mode activated');
+               }
+
                // IE kludge
                if (!xmlhttp) {
                        document.getElementById("prefContent").innerHTML = 
@@ -1187,12 +1279,10 @@ function init() {
                        return;
                }
 
-               active_tab = getCookie("ttrss_pref_acttab");
-               if (!active_tab) active_tab = "genConfig";
-               selectTab(active_tab);
-       
-               document.onkeydown = hotkey_handler;
-               notify("");
+               xmlhttp.open("GET", "backend.php?op=rpc&subop=sanityCheck", true);
+               xmlhttp.onreadystatechange=backend_sanity_check_callback;
+               xmlhttp.send(null);
+
        } catch (e) {
                exception_error("init", e);
        }
@@ -1345,7 +1435,7 @@ function selectPrefRows(kind, select) {
                } else if (kind == "fcat") {
                        opbarid = "catOpToolbar";
                        nrow = "FCATR-";
-                       nchk = "FCHK-";
+                       nchk = "FCCHK-";
                        lname = "prefFeedCatList";
                } else if (kind == "filter") {
                        opbarid = "filterOpToolbar";
@@ -1355,7 +1445,7 @@ function selectPrefRows(kind, select) {
                } else if (kind == "label") {
                        opbarid = "labelOpToolbar";
                        nrow = "LILRR-";
-                       nchk = "LCHK-";
+                       nchk = "LICHK-";
                        lname = "prefLabelList";
                } else if (kind == "user") {
                        opbarid = "userOpToolbar";
@@ -1409,3 +1499,57 @@ function toggleSelectFBListRow(sender) {
        toggleSelectListRow(sender);
        disableContainerChildren("fbrOpToolbar", getSelectedFeedsFromBrowser() == 0);
 }
+
+var seq = "";
+
+function pref_hotkey_handler(e) {
+       try {
+
+               var keycode;
+       
+               if (!hotkeys_enabled) return;
+       
+               if (window.event) {
+                       keycode = window.event.keyCode;
+               } else if (e) {
+                       keycode = e.which;
+               }
+       
+               if (keycode == 13 || keycode == 27) {
+                       seq = "";
+               } else {
+                       seq = seq + "" + keycode;
+               }
+
+
+       if (document.getElementById("piggie")) {
+       
+               if (seq.match("807371717369")) {
+                       seq = "";
+                       localPiggieFunction(true);
+               } else {
+                       localPiggieFunction(false);
+               }
+       }
+
+       } catch (e) {
+               exception_error("pref_hotkey_handler", e);
+       }
+}
+
+function userSwitch() {
+       var chooser = document.getElementById("userSwitch");
+       var user = chooser[chooser.selectedIndex].value;
+       window.location = "prefs.php?swu=" + user;
+}
+
+function editFeedCats() {
+       if (!xmlhttp_ready(xmlhttp)) {
+               printLockingError();
+               return
+       }
+
+       xmlhttp.open("GET", "backend.php?op=pref-feeds&subop=editCats", true);
+       xmlhttp.onreadystatechange=infobox_callback;
+       xmlhttp.send(null);
+}