Fixed a compatibility issue with IE.

(and replaced custom event addition with simpler one from Prototype)

core/src/main/resources/lib/form/breadcrumb-config-outline.jelly

@@ -36,7 +36,7 @@ THE SOFTWARE.
     TODO: use human-readable ID
   -->
   <script>
-    window.addEventListener("load",function(){
+    Event.observe(window,"load",function(){
       /** @type section.SectionNode */
       var outline = section.buildTree();
       var menu = new breadcrumbs.ContextMenu();

core/src/main/resources/lib/layout/breadcrumbs.js

@@ -15,13 +15,13 @@ var breadcrumbs = (function() {
         return (icon!=null ? "<img src='"+icon+"' width=24 height=24 style='margin: 2px;' alt=''> " : "")+displayName;
     }
 
-    window.addEventListener("load",function(){
+    Event.observe(window,"load",function(){
       menu = new YAHOO.widget.Menu("breadcrumb-menu", {position:"dynamic", hidedelay:1000});
     });
 
     jenkinsRules["#breadcrumbs LI"] = function (e) {
         // when the mouse hovers over LI, activate the menu
-        e.addEventListener("mouseover", function () {
+        $(e).observe("mouseover", function () {
             function showMenu(items) {
                 menu.hide();
                 menu.cfg.setProperty("context", [e, "tl", "bl"]);

war/src/main/webapp/scripts/hudson-behavior.js

@@ -1486,7 +1486,7 @@ function refillOnChange(e,onChange) {
                 if (window.YUI!=null)      YUI.log("Unable to find a nearby control of the name "+name,"warn")
                 return;
             }
-            try { c.addEventListener("change",h,false); } catch (ex) { c.attachEvent("onchange",h); }
+            $(c).observe("change",h);
             deps.push({name:Path.tail(name),control:c});
         });
     }