Implemented OpenLayers.Util.mouseLeft to make up for a lack of onmouseleave in Mozilla.

git-svn-id: http://svn.openlayers.org/trunk/openlayers@306 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Util.js

@@ -749,4 +749,18 @@ OpenLayers.Util.getTagText = function (parent, item, index) {
     } else { 
         return ""; 
     }
-};
+};
+
+/** 
+* @param {Event} evt
+* @param {HTMLDivElement} div
+*
+* @return {boolean}
+*/
+OpenLayers.Util.mouseLeft = function (evt, div) {
+    var target = (evt.relatedTarget) ? evt.relatedTarget : evt.toElement;
+    while (target != div && target.nodeName != 'BODY') {
+        target = target.parentNode;
+    }
+    return (target == div);
+};